Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8a6a68d29cc805…

MALICIOUS

PDF

87.0 KB Created: 2021-09-10 18:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 214cd979adce257de88e1495f2e52c45 SHA-1: 507e317c7c5bf8aa7e6dd157f834a19d96add356 SHA-256: 4e8a6a68d29cc8053806c6cb026be3b5f93c8bba1c273651e392654f526f47c6
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains embedded URLs and the heuristics indicate it's a link farm on disposable hosting. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the user is prompted to call a number. No scripts were extracted, but the presence of multiple unknown URLs points to a potential download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pepinieramontana.ro/ckfinder/userfiles/files/63137417904.pdf In PDF document text
    • http://yoga-privates.com/yoga-privates/file/xijizug.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/35432523477.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/96368228116.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/julerirobos.pdfIn PDF document text
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/mulugo.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/58504548991.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/nexonasila.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/fojawixenisotizekisigade.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/ced3fdaed89525630b4db376aeeed0ed/xaxugitewibebifi.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/20185503374.pdfIn PDF document text
    • https://finliz.lt/i/File/44179074211.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/bedojesexiv.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/zojosalajogoka.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/34866581648.pdfIn PDF document text
    • https://novsport.com/content/File/36258891002.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/65570097054.pdfIn PDF document text
    • https://hotlinepro.in/admin/userfiles/file/pedirimeneriwulefunagabox.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/92f187c2feb46bd9b94f0596b2c77251/85939299791.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/nuwawuvusowafe.pdfIn PDF document text
    • http://www.truca-taoules.com/ckfinder/userfiles/files/tirifawobowodutaf.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/foxawevevoponisibu.pdfIn PDF document text
    • http://tyextractor.com/d/files/35548528052.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/85593151392.pdfIn PDF document text
    • http://mywayrtk.org/userfiles/file/48378031406.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=lulubox+diamond+free+fire+2021PDF 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_off0000ee75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE75 18300 bytes
SHA-256: a783a5f3fd15d43dc9fbcc50935e484532c4ff49d23c083201a902ec94d5bf7e
font_01_sfnt_off00011d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001358d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1358D 10840 bytes
SHA-256: 4762cbec41ce7eb9f23ef0b1b0b35e74f1a268ae277c19d47d42421b824520f2