Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e484de5dcd51eee…

MALICIOUS

PDF

77.2 KB Created: 2021-02-27 01:03:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 68383fbada228cc974a7c641ecb60195 SHA-1: 744bb93126195e48bb6891126e49eb605557a3b1 SHA-256: 2e484de5dcd51eee4faf41e86d3efe5a78b9ad8d30c08817bc8e98ca3d87f6d0
186 Risk Score

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 6

  • 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.
  • 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://baarspo.ru/123?utm_term=can+civilians+get+navy+federal PDF link annotation
    • http://rosutob.getenjoyment.net/what_are_structured_credit_products.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/Dgjgi1C/nascar_speedpark_ticket_prices.pdfIn PDF document text
    • https://tipoxuxol.weebly.com/uploads/1/3/0/8/130814923/9387700.pdfIn PDF document text
    • https://tebifenan.weebly.com/uploads/1/3/4/6/134675993/2ed1a.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/transformational_leadership_in_nursing_practice_challenges_and_strategies.pdfIn PDF document text
    • https://poliradu.weebly.com/uploads/1/3/5/9/135991332/fujiw-gefunexuzujok-xakaxotameda.pdfIn PDF document text
    • https://womevelem.weebly.com/uploads/1/3/2/8/132814223/bbf5f9e4d.pdfIn PDF document text
    • https://labelamujevodit.weebly.com/uploads/1/3/1/6/131606697/vowepalagononu.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/rogevudaguzapovomalutatiz.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
    • http://pimorem.epizy.com/93679995774.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/free_amelia_bedelia_books.pdfIn PDF document text
    • http://jilutuve.rf.gd/bowflex_pr3000_review_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/saxisuxutewovikunudeki.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/zevakawe.pdfIn PDF document text
    • http://legolipif.epizy.com/fantastic_beasts_and_where_to_find_them_2016_trailer.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_off0000e44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44E 5052 bytes
SHA-256: 614a9c5e77c42ea53908e1c67b77e71a9be9378b0aececdf2a2e4c7911214192
font_01_sfnt_off0000f593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF593 10688 bytes
SHA-256: c2f5909d172a856319831d1311cbf44530c6a547fcef73015cb7f49dd0692cfa
font_02_sfnt_off000119ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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