Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f4c5eff959bd8d…

MALICIOUS

PDF

81.3 KB Created: 2021-09-18 21:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: fef2c4005527c0b684d8d44f1ebd4418 SHA-1: 477942ed5fc173f3f276a4be7445081df8ee7cb3 SHA-256: 01f4c5eff959bd8d010cff4d8d33d05d5bd26b7d16fd5356f5723fb2c26d45d8
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or tech-support scam. The heuristic 'SE_CALLBACK_LURE' indicates the document attempts to trick users into calling a phone number. While no scripts were extracted, the presence of numerous external URIs, including one with a 'utm_term' parameter, suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://catamma.ru/uplcv?utm_term=granny+smith+android PDF link annotation
    • https://www.leasing.net.in/ckfinder/userfiles/files/4062208007.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16136532d97e8c---62507975957.pdfIn PDF document text
    • https://kaptenhoki.org/contents/files/40915374733.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/30545982705.pdfIn PDF document text
    • https://vwb.mrv-educationservices.com/content_file/files/2444232041.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/povedizigibateliz.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210905081613_961w20.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/paseluvodon.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/55146556981.pdfIn PDF document text
    • https://ms01bet.net/contents/files/74269462194.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/pubuw.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/43581947508.pdfIn PDF document text
    • http://ecoevopublisher.com/files/upfiles/file/rubawisobubenexojaso.pdfIn PDF document text
    • http://novichiha.ru/pic/file/nabojolijorusagisiket.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/subep.pdfIn PDF document text
    • https://coop-alternatives.fr/images/images/39099108335.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/70060676652.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/56807690310.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/ropararejulipakaselade.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/dapotubiwuvupa.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/73699139202.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/60976961180.pdfIn PDF document text
    • http://lmnn.ru/userfiles/file/42418990909.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/31346622150.pdfIn PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/27496740051.pdfIn PDF document text
    • http://annabarons.com/files/files/94022887696.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_off0000d624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD624 10488 bytes
SHA-256: 5f056c682ff84df0a85aa53ec1fa1213b4550a1a867f6bef8dec5412c6041a0f
font_01_sfnt_off0000edcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCF 19820 bytes
SHA-256: a1a649e262ddd23e571aa499a2d61e846d2032ff62fe2d44d2e978b22233f563
font_02_sfnt_off00011f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1