Malicious PDF — malware analysis report

Static analysis result for SHA-256 a21d6b38d688d35e…

MALICIOUS

PDF

58.3 KB Created: 2020-12-18 01:06:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10b090c5df8b64045658c7cbb657927d SHA-1: 758288674046ed48d9b909f54f742b67897df05e SHA-256: a21d6b38d688d35e9c0f280cedfa0d3fca0391e9c89e4e6ce3fa194453ec127e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by a machine learning classifier and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, disguised as a public health laboratory requisition form, which is a common social engineering tactic to trick users into clicking malicious links. No scripts were extracted, but the presence of a malicious URI and the phishing lure strongly suggest an attempt to deliver a secondary payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/aws?utm_term=public+health+ontario+lab+requisition+form
    • https://cdn-cms.f-static.net/uploads/4486344/normal_5fb48b9cd9cfe.pdf
    • https://cdn-cms.f-static.net/uploads/4421788/normal_5fd6007c753b8.pdf
    • https://cdn-cms.f-static.net/uploads/4387424/normal_5fc118c9ad156.pdf
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f8a443e481e9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5d5e0e74-fba9-4679-bfd7-83b39933ec2b/99657602132.pdf
    • https://uploads.strikinglycdn.com/files/a5d6b1ab-076c-4930-a3be-c7ec4901a860/pirelli_calendar_2010_video.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6505173fb5383b9a57d5/1606378758769/jejusorefitigowifaja.pdf
    • https://s3.amazonaws.com/jobavo/68620762749.pdf
    • https://s3.amazonaws.com/tonemakopinibem/41419799268.pdf
    • https://static1.squarespace.com/static/5fc79cbd418d7934ac780470/t/5fd66be8ab777271769058fa/1607887849738/ripusimoziwirigekides.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa8c.bin
02ace7962bea9587d195cb207cd03f48297878d331f978a21be6b450fdca036b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA8C 5388 bytes
font_01_sfnt_off0000bcb9.bin
98537f6bf0239b10ceb3f29896cb83bca5827496331fac39d2523b9a7bb68222		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB9 9164 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.