Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea9b9816aa4354b…

MALICIOUS

PDF

66.4 KB Created: 2020-12-20 20:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c737e61e23402514a821101e8ce6c2bd SHA-1: bff3e135a58172012c4d869f483cd7bce573b94d SHA-256: 8ea9b9816aa4354b99aecf3ff8ab94134dded413073ece097c2069487107ecf1
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 as malicious by ML classifiers and ClamAV. It contains a large number of embedded external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://trafffe.ru/strik?utm_term=kitty+ward+elementary. No scripts were extracted, but the PDF structure itself facilitates the attack by directing users to external resources.

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://trafffe.ru/strik?utm_term=kitty+ward+elementary PDF link annotation
    • https://jezugazaditok.weebly.com/uploads/1/3/4/6/134601365/mavizike_dexuxe_jisosifojula_xebugobuboxox.pdfIn PDF document text
    • https://xoretesani.weebly.com/uploads/1/3/4/3/134315313/mulekidakofa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410214/normal_5fcf32fb7f3bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403531/normal_5f938c0d1e2a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413110/normal_5f95b1cb75e9d.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/pojetowur_xapavosoluv_pewomale.pdfIn PDF document text
    • https://lifitexuga.weebly.com/uploads/1/3/4/3/134356919/xaxikijejovogofik.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/vasebusom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f88b6de6a5c8.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://s3.amazonaws.com/nisiwanolom/bareilly_ki_barfi_movie_movierulz.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/fubagawivikomusizu.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/cockatiel_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/bidojuxisojetevovokiki.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/10271939856.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/alien_shooter_mod_apk_obb.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_off0000ba7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA7F 4636 bytes
SHA-256: c56f945d09f8caa242f26e5f390caacf30809f655886486c3003e5488fc83651
font_01_sfnt_off0000ca29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA29 10768 bytes
SHA-256: 36d9dcd151b999b3145a95a9aed4d5bc878fff6618d86a781ef7f929392da0d9
font_02_sfnt_off0000ef1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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