Malicious PDF — malware analysis report

Static analysis result for SHA-256 2425bc97ae2fddb2…

MALICIOUS

PDF

192.0 KB Created: 2021-04-20 19:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9918d646cac7fe0ea5acd4bb8546eb16 SHA-1: c09fa851a2c98bc45d000b4a374ee0f7d047a2e1 SHA-256: 2425bc97ae2fddb2d994787c7684796866d0f8bbb0a4a1d9eb6f07b0172e5272
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 0.9997

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 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://gimoguvi.ru/strik?utm_term=fantastic+mr+fox+ash+quotes PDF link annotation
    • https://tebugusenaj.weebly.com/uploads/1/3/4/8/134870623/1abb49499.pdfIn PDF document text
    • http://dupomixu.iblogger.org/wosonesuf.pdfIn PDF document text
    • http://daxumokavokawu.iblogger.org/book_of_troth.pdfIn PDF document text
    • https://bofejaximolapob.weebly.com/uploads/1/3/4/7/134751884/c1d98489.pdfIn PDF document text
    • https://dujapiloxi.weebly.com/uploads/1/3/1/8/131857305/momul.pdfIn PDF document text
    • http://poopo.ru/gudijugaiv83.pdfIn PDF document text
    • http://faceit.su/camera_360_lite_androidrts6c.pdfIn PDF document text
    • https://mabalavorejeg.weebly.com/uploads/1/3/4/7/134769590/ruvupibid-fasoj.pdfIn PDF document text
    • https://kanoritixuvu.weebly.com/uploads/1/3/4/8/134874131/d9f897468e49a.pdfIn PDF document text
    • http://jushq.pro/84052790637jmayt.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/0109e175-ab4d-4fde-b576-48e48be5bb91/what_are_the_characteristics_of_a_formal_writing_style.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb41ab9f-01e8-4693-bbf0-cc365add3ed1/magic_chef_refrigerator_repair_service.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be82ef6-930a-4ce8-b971-0a92e706a396/wifosasefuruwuvixerutevuz.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/cars_3_diecast_poster.pdfIn PDF document text
    • https://170d08c7-2527-4f8e-8bc4-cf7f6ffab704.filesusr.com/ugd/afe24e_efd842b6b79845a69aa47cd2553f21be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kevava/noun_adjective_adverb.pdfIn PDF document text
    • http://sulifuzefusuw.rf.gd/8166330625.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/83037593498.pdfIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_8ce56a59840f41be821727031de0480b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/rugoseja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d293159e-dda4-4a83-8fb5-cdcbb98177f5/63676979758.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/criminal_song_ra_one_320kbps.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_off0002bb24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB24 5236 bytes
SHA-256: f5af655bd0c2e00db9f5d0b21cdda2d4bba81836be5566431b1be6abc0b4e7b9
font_01_sfnt_off0002ccd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CCD5 11036 bytes
SHA-256: 09ddb18dfdbddd257fbb948368bbb4c267b71bad4b1870564971ed0e875058d5

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