Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e95e1716c0f0fb5…

MALICIOUS

PDF

62.3 KB Created: 2021-01-10 03:14:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e2283b5c909b18f8523c07cd61a44a8d SHA-1: 028996829fd9a9b4061a4c019236533e1ce21343 SHA-256: 2e95e1716c0f0fb549eb78c8bb62740b592ede9d3adb94327432852355df494e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting an attempt to redirect users to potentially harmful websites. The presence of embedded URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/aws?utm_term=breakup+whatsapp+status+tamil+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447280/normal_5fc1d122ddb97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_5fac44fba3f36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379233/normal_5fcbbba8a2412.pdfIn PDF document text
    • https://cdn.sqhk.co/pibilebomek/igjjajg/anime_maker_app_for_pc_download.pdfIn PDF document text
    • https://goxuxogegeta.weebly.com/uploads/1/3/4/6/134688707/6372543.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426815/normal_5ff70b322f0a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427313/normal_5fec208f78573.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374951/normal_5fe5927914f0a.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/gotitibekovi/brazeau_loop_trail_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/effy_full_form_in_marksheet.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_off0000ad09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD09 5240 bytes
SHA-256: e87d187a51c54582f499e95b865e7ad6c854ebc90164dabc3769273e355d2cec
font_01_sfnt_off0000bef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF4 9224 bytes
SHA-256: ad7a0352107572222854a64b941799b7fb82a8e33eb04f9797d32776774ff9a2
font_02_sfnt_off0000de94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE94 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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