Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a1aa2fcf46f75c6…

MALICIOUS

PDF

89.5 KB Created: 2021-04-03 19:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 35c4e6636cd24b7341e0fe15bb8e6d6f SHA-1: 1115eab0f302e094cce89ad0c7d49345188d86f4 SHA-256: 7a1aa2fcf46f75c6f968e0139dcc2decb926096b363e37b4a9ab111afb875171
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://lozipotod.ru/123?utm_term=american+pie+8+dual+audio+movie PDF link annotation
    • https://cdn.sqhk.co/gasubapo/hejgkbs/93930213320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_602a57915f9a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467273/normal_5ffff44c4e5e0.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/jgdjdhh/bajizopolomagimabuxorigir.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/jdghfiD/ligozavebesarolejafufaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_601eb9ead1d5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482869/normal_5ffdd6e729747.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475859/normal_5ff5bf8f9e4c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://devuzobek.rf.gd/radio_bodor_sunda_cangehgar.pdfIn PDF document text
    • http://potolipok.epizy.com/big_ideas_small_buildings.pdfIn PDF document text
    • http://nogawejasibab.epizy.com/monster_manual_free_download.pdfIn PDF document text
    • http://wilesodirax.epizy.com/53506926998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc68adee-8347-4558-926c-a68a269b27c2/5137867190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d099bb7d-0429-4574-9662-d8ba990c8f32/how_do_you_calculate_julian_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/616624b4-e500-4266-b417-a80eeab42df2/the_standard_miami_bath_terrace_large.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de451a2-cff0-4772-988c-d9e34fa2e115/what_type_of_fish_does_long_john_silvers_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/175e66aa-2437-45f9-ace1-8cd6a2153f23/how_to_interpret_line_graph_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45c9220b-845a-4ea5-9ed1-61d962c21f16/how_to_apply_3m_vinyl_stripes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a20d1e5-d844-4262-92ab-000dd2ce596b/78786998679.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_off00011cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD3 5284 bytes
SHA-256: 6977c787a2e0f1b7ea3ed7279cfa614372424d1a9254ee9751f57303fcf5562b
font_01_sfnt_off00012ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBD 11936 bytes
SHA-256: e7515ff7d9c7939ce6e78257261b08a6c4d25d4bbfb66ab3f54c2f2f6f5ef4d0

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