Malicious PDF — malware analysis report

Static analysis result for SHA-256 b868385979f53381…

MALICIOUS

PDF

69.5 KB Created: 2020-12-17 03:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: a397699e408191d652a31459f1773e42 SHA-1: db9ce5dee84fb0f41a7b153ab5d9f8c0a0efd7ec SHA-256: b868385979f5338157815306a78a1cf2a2d2adbbeb665d560bd9a0fff785fd7a
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host a large number of external links, likely for SEO manipulation or to distribute malicious content. The presence of external URIs, including the suspicious domain 'trafffi.ru', further supports this. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/strik?utm_term=frozen+chicken+breast+in+air+fryer+pro PDF link annotation
    • https://fixivure.weebly.com/uploads/1/3/4/8/134888316/fawozofodadaxabigi.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/mogetabetinutil.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/9dd6f8b7.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/kerej_kinunuzidazat_dawuzudo.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/fikor_fewuluz_kuwof.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/mimuwev.pdfIn PDF document text
    • https://rexawalifutox.weebly.com/uploads/1/3/4/4/134458468/silulisazubamefu.pdfIn PDF document text
    • https://mamotuzukaw.weebly.com/uploads/1/3/4/4/134438076/buzofolagan_narusukokaxemu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe013f645712565400a2a3/1606287683086/volume_of_a_cylinder_practice.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a99e8ef7301f8b317e6a/t/5fcdddaa2bc7884852d745e3/1607327147016/hearts_queen_of_spades_first_round.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4a30fa04221c71167fee/1606371889830/yamaha_v_star_1100_specs_2005.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12a77be9b6939510c7598/t/5fc2ced5eaf37e3b64f97374/1606602453811/23499253211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199be9a2-8758-4897-819d-6bc83f4ac4da/unit_periodic_trends_ionization_energy_trend_worksheet_3_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9875f8b-219f-42ba-b6b3-6c97e3684b0f/ancient_egypt_and_civilizations_map_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2908dc89e1c4b8fc91e59/t/5fc4020b3485235c8642b5a2/1606681100497/multiplying_functions_worksheet_algebra_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6051356-3502-412c-ae32-4a5b74aaccb8/zisobodaxetem.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC745 5168 bytes
SHA-256: ec22db78052e59a1db3732e5101d6628818ac12f1706e666b4704f047343dda8
font_01_sfnt_off0000d8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D7 9968 bytes
SHA-256: ecb4458c152827e8d28ae7d3b7f7dffe9442375632138f04b4952898efd7ada4
font_02_sfnt_off0000faec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEC 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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