Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d1b3b12b445cc1…

MALICIOUS

PDF

79.2 KB Created: 2021-09-14 00:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fc17ee486c6a0fca0e671097d96e408b SHA-1: bcba46051c78811b3e2302f76e66a94139420e77 SHA-256: 32d1b3b12b445cc15ad13cc496ecdecc32d84adf9baf9059334fd191bf77b782
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm and a callback phishing lure. The document contains numerous embedded URLs, many of which are unknown in reputation, suggesting an attempt to direct users to potentially malicious sites. No scripts were extracted, but the PDF structure and heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://kondicionery-dolgoprudny.ru/upload_picture/file/73661101144.pdf In PDF document text
    • https://zemtechnika.lt/public/site/0files/faxetovodudofim.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/49460056574.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/pewonupitixufexur.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/giruzeronogoludivupum.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/faf6dd9fecf62fb09416290d85843993/kobexotu.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/96658875912.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/66849130613b9aa58ba44.pdfIn PDF document text
    • https://wecareprogram.org/images/file/jodedovelemabux.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/mofamamijin.pdfIn PDF document text
    • https://digicpictures.com/downloads/61633462520.pdfIn PDF document text
    • http://yuanjiangchem.com/upload/files/72946618057.pdfIn PDF document text
    • http://odra.cycling-recycling.eu/imgturysta/files/satalupego.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613cdef6a248c---50153616760.pdfIn PDF document text
    • http://abpjse.news-read.com/upload/files/53154119510.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/87956019839.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/muzuvufid.pdfIn PDF document text
    • https://ateliersmq.com/pevron/www/img/file/vuxuzalitereviwipemusuj.pdfIn PDF document text
    • https://togeltop.net/contents/files/73273869179.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/dijipurejoxijepamogo.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/94386912880.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/vajolav.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/sevakoboxujamixukemegise.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/wojete.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/gamobewe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=gt+racing+2+androidPDF 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_off0000d327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD327 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB39 17256 bytes
SHA-256: 046316bb07393cb765ae496c2f13d3fcabc02cf3ee629c1a779f38d0b9de4fff
font_02_sfnt_off0001181d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181D 10356 bytes
SHA-256: 59dab2f03a88735088715482715de987f3a920b5c5462abb259e978a7cb483ea