Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0fbc3b40377aa7…

MALICIOUS

PDF

91.9 KB Created: 2020-12-29 11:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 35d767c2d44f927a4db8c815d2be61dc SHA-1: 1fc30aa902365396aa0e169b5f56a3d6f7e059a3 SHA-256: fa0fbc3b40377aa73210c24817d0e2412704f6c3d00478375f732fd3d486c72c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://traffine.ru/strik?utm_term=high+speed+racing+car+game PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481173/normal_5fbec54dd0355.pdfIn PDF document text
    • https://ligibumifi.weebly.com/uploads/1/3/4/6/134647936/videsekiritu.pdfIn PDF document text
    • https://cdn.sqhk.co/kimamena/gbhhGKz/crossfire_sports_car_price.pdfIn PDF document text
    • https://puzemebakojufem.weebly.com/uploads/1/3/4/2/134234574/6564816.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxawexa/biejfjQ/68651880567.pdfIn PDF document text
    • https://levapexufusetij.weebly.com/uploads/1/3/4/9/134904519/denonemixaretex-nifuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/401ff077-181c-48b5-9e1c-153b70aec690/gexemupexagaginut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404d39f2-635b-49f5-97ec-564ab4db6956/87012765712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c332332-9252-449e-aeea-fa32219a2e39/a_fresh_look_at_phonics_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67fa9ddd-b8bd-4306-96d5-055b2349ac52/automatic_shift_knobs_350z.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e409f2b-3fc0-4bf9-912c-2b977ac7f1d8/kavaniguwagaguxomoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30421621-a111-454f-a5fb-88cf959e56b7/99407397141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eff1f5a-a751-4a04-8ca4-f72ad950eab3/simple_the_easiest_cookbook_in_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e59099ae-5de0-49c1-b57d-076f37fee76c/warwick_school_committee_facebook.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_off00012c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C68 5416 bytes
SHA-256: 5eb56c2a59bd473811a52246ec2be5911fa09c18a6e86eb05fd6346e8a89da8a
font_01_sfnt_off00013ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAD 10892 bytes
SHA-256: 174c4c45d3e84263cf3c111d8120779c99dc191fb73fc5e8a0037cdaea216d0f

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