Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0ec24fc0123c5f…

MALICIOUS

PDF

82.9 KB Created: 2021-09-12 09:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e7e7412b9a019c26384c36e3d036c2e6 SHA-1: 1bc63aaf511822e2d844a4ec1fdf8b81d92da4d5 SHA-256: be0ec24fc0123c5ffce4849346234f5887abb56248e780a67cf2fcb32b3c290c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous links pointing to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'Powershell V1.0' in the document text indicates potential execution of commands, likely to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • 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 https://crewmak.ru/uplcv?utm_term=how+to+install+play+store+app+in+pc PDF link annotation
    • http://khojedu.net/userfiles/file/kikogamavezafafosowafov.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/91261131791.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/pesanazevaxe.pdfIn PDF document text
    • https://gkatsov.com/userfiles/file/puxedixuturetiriti.pdfIn PDF document text
    • https://svltv.in/userfiles/files/55378934219.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/tosejolitimif.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/13681603145.pdfIn PDF document text
    • http://hitplus.eu/userfiles/file/75113166437.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161338310be884---13939866098.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18379538703.pdfIn PDF document text
    • https://dragonexpressml.com/userfiles/files/25470895687.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/23591130838.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/zonipetukolijejaz.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/30436843934.pdfIn PDF document text
    • http://www.shjkyq.com/up_files/FCK/file/60730923476.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/90311153429.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/gojipu.pdfIn PDF document text
    • https://stephan-kratt.de/data/reiterhof/userfiles/file/36285877576.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/wefujediwagugubifit.pdfIn PDF document text
    • http://www.santabriganti.org/admin/ckfinder/userfiles/files/55657829051.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/fivasalujigug.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec28d4bbc9---segaz.pdfIn PDF document text
    • http://epplast.com/files/file/85234574321.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/nedezupatusuvazejifanot.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/37623667635.pdfIn PDF document text
    • http://tuzy.pl/Upload/file/29693100546.pdfIn PDF document text
    • 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_off0000dbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF407 10560 bytes
SHA-256: 2c508bf0de104bfbacf19df4dcbc17544b16ddf937bac86f23556416f2980b01
font_02_sfnt_off00010c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C48 18836 bytes
SHA-256: 4ba580b5e66349dd995e5098ef6f5e4fc049f5e6063fc1f874456bbb7d6efe4d

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