Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a7d0c2ed626d72…

MALICIOUS

PDF

66.4 KB Created: 2020-12-15 16:47:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 07ef498bfb6c494b2ad6544e05a6c4fc SHA-1: d68ac33f452b909557c8375f3865c249cbbb5a58 SHA-256: f5a7d0c2ed626d722ac164f2d12a8cb13b33afd4b660c352703d20b122a29ea1
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The document body, though heavily obfuscated, contains text related to 'Rsa 2020 schedule', suggesting a lure. The presence of multiple external URLs, including one pointing to a potentially malicious domain ('trafftec.ru'), indicates an attempt to redirect users to malicious or spam content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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.
  • 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://trafftec.ru/123?utm_term=rsa+2020+schedule PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376362/normal_5f8f3d0f3a121.pdfIn PDF document text
    • https://nogapixefakul.weebly.com/uploads/1/3/4/5/134590999/vofisiferegoju.pdfIn PDF document text
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/xexaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/rockspace_extender_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b401c1-69b5-4255-a5cb-7f2452d3acde/47174884764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2444df65-da54-483b-b05a-64c68be13912/lazilumaxetik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c0361bd-7860-4e38-baa1-79e19b8887be/vibakusixilofenip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5d384a4-338e-49c5-927d-1320d7248582/seven_serpents_colt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c08b0cf3-ca75-4416-8e3c-c534d1669ef5/87987142561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5747cff-b2b8-403f-93f8-d83de328f5c9/kinegab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e63adaf4-c741-4b95-a509-04b29b334e63/watch_legend_of_the_guardians_the_owls_of_ga27hoole.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC623 5212 bytes
SHA-256: 4575e117679c6af2acd50a8ca93b814fa2b741e0e1680c82ffff62320bba9039
font_01_sfnt_off0000d7d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D8 11280 bytes
SHA-256: c37973c431fc37649602312f9d8f5487a8ab586f7ea2bc7de642a65ea3d58e4a

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