Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafd7aa40b8190d5…

MALICIOUS

PDF

69.7 KB Created: 2020-12-21 06:03:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 06e30e215fb57af29afdb8e731bfbe74 SHA-1: 5cd8f868fe2f2e3e593a740e6975a1b7d756375f SHA-256: fafd7aa40b8190d5f58e748081c8e443ec7452f5083a66d88ae8c116ac3e2abe
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm designed to lead users to malicious sites. Heuristics like PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly suggest this phishing or scam attempt. The ML classifier and ClamAV detection further support the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://traffine.ru/123?utm_term=abstract+language+writing+definition In PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/vemakebojutig-luwugofusuvena-toxiritinixo-bakuw.pdfIn PDF document text
    • https://pexafibilo.weebly.com/uploads/1/3/4/4/134484824/notomomovu.pdfIn PDF document text
    • https://xijapesulole.weebly.com/uploads/1/3/4/5/134588017/setunofegox_luzukodex_luraziromami.pdfIn PDF document text
    • https://pulimogub.weebly.com/uploads/1/3/4/3/134312020/3468633.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/7806506.pdfIn PDF document text
    • https://noxitituruvid.weebly.com/uploads/1/3/4/9/134904787/girujine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fce64d82951692d425d42ae/t/5fd1713bef89ac66836b7f2b/1607561537006/hill_dirt_master_off_road_racing.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f169085bf90c0efd4cbb/t/5fc11cd95147b148045b59eb/1606491353488/los_extraterrestres_otra_dimension.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1df9306-867b-4721-808c-4e8f46b652cb/tibosajemoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6965a24-39a3-4dad-a0e7-1f8a5a675af4/tiviwajulunimuxoledo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca080db6-74c6-4e7f-8eeb-853b5a687953/76046883357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d52167a-c860-4515-ba62-d75c8e6e3cb5/unable_to_complete_version_check_ffxiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eb738f9-aede-42dc-b2ef-9a81bd3ba69b/chimney_free_electric_fireplace_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20ad24af-f6e4-4fb1-ab10-dbe97d155a9b/hobo_game_3d.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_off0000d4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CA 5412 bytes
SHA-256: 9e7948a625f50e5ad971624f51f69bcb7b93a183a3331a5bd3ce298eb96106ac
font_01_sfnt_off0000e749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE749 10104 bytes
SHA-256: 1cd74b18938cce48b9c1d75ec4c44493127a0648d25ca2a73af9b238b192ace9

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