Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94afea7b7ca7a03…

MALICIOUS

PDF

73.2 KB Created: 2021-09-23 03:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e36d8b62b38f8255522d263b7a5fb749 SHA-1: f6d8f0b43a7094f7a950d73801277c359b2ae9f4 SHA-256: d94afea7b7ca7a03b0ac869fd599b174fbff0774b617368fbcdafcf339985bd7
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing scam. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in tech-support scams. While no scripts were directly extracted, the PDF structure and numerous embedded URLs suggest it may serve as a lure or a downloader for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://floresdeserrezuela.com/aym_image/files/4160886966.pdf In PDF document text
    • http://thenext.pk/userfiles/files/9468371282.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/dexuzuvafe.pdfIn PDF document text
    • https://vsevolozhsk.mebel18.com/uploads/files/pifeduramugonazuwuves.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/73061574431.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613add8fc427f---zofivikegut.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/19052855164.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c7358df3e---49468963429.pdfIn PDF document text
    • http://www.hkrns.org.hk/ckfinder/userfiles/files/kozapozofofewigolu.pdfIn PDF document text
    • http://geoman.cz/data/file/69654342115.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/zasarowuzetavevu.pdfIn PDF document text
    • https://laptopserwis.com/app/webroot/media/files/dosoju.pdfIn PDF document text
    • http://lemonsport.hu/upload/file/56986286485.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog/file/68390155417.pdfIn PDF document text
    • http://s4l.vn/storage/ckfinder/files/xupuxupiges.pdfIn PDF document text
    • http://ranch.pl/files/file/50920703908.pdfIn PDF document text
    • http://litroshaber.net/resimler/files/59024947592.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/55492919177.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/49192901746.pdfIn PDF document text
    • https://successstudio.net/userfiles/file/59083935265.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/55442442109.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/32976237969.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=tardis+ringtone+for+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_off0000ba60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA60 17316 bytes
SHA-256: a2c4c3157da30e4c27445ccaae2f1a9b1611ba20f1cc586e0ab2f76bf7068bf3
font_01_sfnt_off0000e755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE755 10448 bytes
SHA-256: 0c77dd769c9c2fa22886727f48b89c988c7eb5e3dbddac7170be1c106b204719
font_02_sfnt_off0000fef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1