Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb62ce7c5658c4e2…

MALICIOUS

PDF

78.0 KB Created: 2021-09-10 20:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1814ad5d6dda767ad51453cf5f751d79 SHA-1: 4a7a6f8eca684c815f6dc9284e4f0580505092e2 SHA-256: eb62ce7c5658c4e28b53fe47d27a91c3ebcef7ca1295aef958db64beca08f5a6
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and a link farm pattern suggests an attempt to redirect users to malicious content or phishing sites. The 'SE_LOLBIN_RUN_COMMAND' heuristic indicates the document may attempt to execute commands, potentially to download and run further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/3f3015075cf7aab946414a2c7e8a720c/domepaxilofati.pdf In PDF document text
    • http://ng-sons.com/userfiles/file/23451166097.pdfIn PDF document text
    • http://mamitobe.ru/files/file/gomekivison.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/dojutosabumowuv.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f423149dae---74536964483.pdfIn PDF document text
    • http://dywin.com/uploadfile/files/51430204614.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/27899979768.pdfIn PDF document text
    • https://littleedupark.com/ckfinder/userfiles/files/wixijopolofinune.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/lezij.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/kodobexujakoketemu.pdfIn PDF document text
    • http://camara.acessoainformacao.org/uploads/ckfinder/files/5952683668.pdfIn macro / runtime command snippet
    • http://newkontakt.ru/userfiles/images/file/89105808595.pdfIn macro / runtime command snippet
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/65652194864.pdfIn PDF document text
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/31458477875.pdfIn PDF document text
    • http://artospace.com/pics/file/52185709077.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/20164710679.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/wuzebexareximurazutajotow.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/nutigojiputus.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/50807682999.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/sajumetabul.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/63170194662.pdfIn PDF document text
    • http://bndweb.nl/upload/files/wudatabesimabub.pdfIn PDF document text
    • http://bongoes62.dk/userfilesIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=download+vidmate+apk+freePDF link annotation
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/zopifaxabewijuwatofenom.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_off0000cccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCC 17868 bytes
SHA-256: c6ef4ed393e2fc952824dc83c3632e7741924242414fa6c1b88399a327f76585
font_01_sfnt_off0000fa48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001125f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125F 10736 bytes
SHA-256: 06efafebb7301dfcb3508fb6dcb60d8fe411524302bf920d35a5773ad3825f43

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