Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba5d5bcb3ab79cd…

MALICIOUS

PDF

89.9 KB Created: 2021-07-21 13:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8c8064706eb665d98cb262de9676427f SHA-1: d88ebb244aa8a3775194b389e58e9f33f9381c83 SHA-256: 3ba5d5bcb3ab79cd4d986be6a7a9e5b07beb76ce0f1d33d3c30f2b4b62d14857
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by ClamAV as malicious and exhibits characteristics of a phishing and social engineering attack. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document attempts to trick the user into installing a browser extension or update, a common tactic for malware delivery or credential theft. The numerous embedded URLs, many pointing to compromised CMS upload directories, suggest a distribution network for malicious payloads. No scripts were extracted, but the overall pattern points to a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/bec12344cfefef57230808276239102d/rifimosesetesoxofa.pdf In PDF document text
    • http://navigator-nsk.ru/userfiles/file/79173860306.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/ade5752724e4d70755881d8dd4da3e5e/53155566337.pdfIn PDF document text
    • http://kasargod.net/uploads/file/depisekekufus.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/27954457471.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/rusemenagawafikowivusawa.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/xadifudolalonemipek.pdfIn macro / runtime command snippet
    • http://fw-simple.com/uploads/files/73280443152.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/iutm7t5ucihm7r0bh6lv6ssiaj/madatufi.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/l74p1d4hnp7e921jrmdiupv36j/xamodiwebanopokerufut.pdfIn PDF document text
    • https://megashina24.ru/files/files/53343721652.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/c70ebd5503e505a56dcdd56ed0fbffd4/87667945813.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/xixemaboredazudogo.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/4ac06ea8a54d0232919a3cf8b3e62d4f/logakusosamuwesumezaku.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/50571766645.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/8d8352190c9507dcd07ba478b0d38445/bokutofotozanixokakapisu.pdfIn PDF document text
    • http://ttc-investco.com/img/files/rofuvisodazarojirowibiwol.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/59634150302.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/m1lej95rhdg3u7a83vvsmf3jl8/jofinokokota.pdfIn PDF document text
    • https://ancoraeducacion.com/images/galomafudobukumafoz.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/c6c133954be6027aaa1f8e56d67d2083/66669072663.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/vijajigoxofigufuvav.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/6216997fd3f98488809a307d838fe9c6/mozeput.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/9aatd6ihat5g6337d3s2gceh5t/wezakuwaguz.pdfIn PDF document text
    • http://controldellavesIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=aashiqui+2+movie+with+english+subtitles+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC36 16848 bytes
SHA-256: cb4e01b7fa1d0fc7ffd069e9eb87503a506456c5cf53d94c4b6758a19847747b
font_01_sfnt_off00012833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12833 11232 bytes
SHA-256: aaee147e56554c19622276fe5193d8ea656cc51983a726247d15059eb6d9ace2
font_02_sfnt_off000141f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.