Malicious PDF — malware analysis report

Static analysis result for SHA-256 62121c07afaf783d…

MALICIOUS

PDF

62.9 KB Created: 2020-11-18 19:01:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cd7f25514d71ec1fdee99e1fc2dc5f0a SHA-1: 783e1f25effc52b1ce0a04dbe13d33a25ea7549b SHA-256: 62121c07afaf783dd3bfee1026ca63dced73fa1ef7cdef2613edf925105aeac6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The presence of a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggests a phishing or link-farming scheme designed to redirect users to potentially harmful websites. The primary malicious URL identified is https://trafffi.ru/123?utm_term=team+associated+sc10+drag+car.

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 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/123?utm_term=team+associated+sc10+drag+car PDF link annotation
    • https://gonoloxezejuje.weebly.com/uploads/1/3/1/4/131410007/2421546.pdfIn PDF document text
    • https://fofaxofik.weebly.com/uploads/1/3/4/5/134521529/9526201.pdfIn PDF document text
    • https://lukavorewigi.weebly.com/uploads/1/3/4/8/134862497/88027cbd63f2.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/15d1c391-6e2b-43ff-94f4-0a978e2ea3ac/63840331575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e914e9d9-8905-4c6b-a376-8fcf50af9c68/gidosuzuwipeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b68f6cb-cdb8-41bd-8098-7343899bef96/buroxelon.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/72167216903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05c7d2a7-a557-4935-8845-6f6a88f823c0/8306647113.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/weather_widget_apple.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/learning_hub_frisco_isd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c47c67-3be1-44ca-aeca-46342bbc9d82/norolobaxapogegur.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/black_star_of_india_gem_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4a21ca9-ee83-46df-b3d6-1c3fc6e2da45/three_essays_on_the_theory_of_sexuality.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/40011644834.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_off0000b8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B0 5368 bytes
SHA-256: 07e6984fd365ba48bc9864dc5d6c09ddef474e258b1150c330ae8385846ed385
font_01_sfnt_off0000cada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADA 10212 bytes
SHA-256: 12fbcada81a02cc45d48b0a268d376aadd6a9efbc617806bf35fa9521cd5f361

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