Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1afd467cbd1d5a9…

MALICIOUS

PDF

69.9 KB Created: 2020-11-25 21:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aeea22f00e24d0606797e26ff5c46abc SHA-1: d3028a21e55cda1c888dd0faa247cf08a78c3694 SHA-256: e1afd467cbd1d5a9642759daae8eb4d08bc8638fab54283baa2bf4f068121de8
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, including a link to 'traffset.ru', suggests a phishing or SEO-based lure. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://traffset.ru/strik?utm_term=reformed+teaching+observation+protocol+%2528rtop%2529
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5f88b195d3706.pdf
    • https://nupirunu.weebly.com/uploads/1/3/4/2/134265900/9049988.pdf
    • https://xazaguzomolak.weebly.com/uploads/1/3/4/3/134375957/jodaluzobogu.pdf
    • https://wofexexugov.weebly.com/uploads/1/3/4/3/134318452/09f74874e0b48.pdf
    • https://bidudazup.weebly.com/uploads/1/3/4/7/134744853/46cfb.pdf
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ratot_muweliwamopoj.pdf
    • https://xizafezepogoja.weebly.com/uploads/1/3/4/4/134446531/guwazofe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tosevud/87207799088.pdf
    • https://uploads.strikinglycdn.com/files/f1350e48-c8e7-4e75-a70d-3f41851d0684/44349463982.pdf
    • https://uploads.strikinglycdn.com/files/8f4c845a-ab6a-4e35-bafe-67fb8eb9a706/jamopitorurizudevafoxuta.pdf
    • https://uploads.strikinglycdn.com/files/ca14fcf6-67d0-45e1-88e2-6372b3a25732/zejobafilejizibeneto.pdf
    • https://uploads.strikinglycdn.com/files/55e48abf-2439-4ea5-ae95-d68f04e816f2/oracion_civica_de_gabino_barreda.pdf
    • https://uploads.strikinglycdn.com/files/1855c6e3-2b99-454b-8dd0-6d708d803303/54991972965.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_off0000d03a.bin
30b7da1602e97785056724a33d54e82f03bed0f0327d48abd058200709989e2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD03A 5928 bytes
font_01_sfnt_off0000e456.bin
c1c067171af54d58a0feb1259194f65b5e08495f7c931d0c6e654870a33333c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 11272 bytes