Malicious PDF — malware analysis report

Static analysis result for SHA-256 8691778f98a3d343…

MALICIOUS

PDF

68.0 KB Created: 2021-04-24 13:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d7bee715fb4289d178eea52db47b3d7a SHA-1: 5f1177bbdb519abde4c769ba6216c6adf206a5bd SHA-256: 8691778f98a3d3431b742b5b1b01bd25fd734a5fe9bc2a1e5c1393b8d860f4fe
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on 'https://vilenefex.ru/strik?utm_term=focusrite+scarlett+studio+bundle+price+in+india'. Heuristics indicate this PDF is a link farm hosted on disposable domains, and ML classifiers and ClamAV strongly flag it as malicious, likely phishing or a trojan. The document body, though heavily corrupted, contains fragments suggesting a product search, reinforcing the phishing lure.

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 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://vilenefex.ru/strik?utm_term=focusrite+scarlett+studio+bundle+price+in+india PDF link annotation
    • https://cdn.sqhk.co/lilomovetum/gg9IgUC/4343025924.pdfIn PDF document text
    • http://zijixiteluwek.scienceontheweb.net/vuvoj.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/yegeij4/nature_sounds_music_for_relaxation_meditation_healing.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/39997891613.pdfIn PDF document text
    • http://joxorapux.22web.org/how_to_start_a_nonfiction_book_club.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/hejjSjf/openstax_university_physics_volume_3.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/2c4c5b36-ee0a-4cb4-bce2-a4333d5a79f7/12843653763.pdfIn PDF document text
    • http://zavinawotomuvef.epizy.com/bowuriko.pdfIn PDF document text
    • https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_a5378f7b0051474e97da93d03ba79d13.pdf?index=trueIn PDF document text
    • http://zufelagek.rf.gd/80254746237.pdfIn PDF document text
    • https://0ac950e2-707a-4e47-8bf4-daface0ea9db.filesusr.com/ugd/356f11_bcf35060a8aa4b98a2be09493cf13a25.pdf?index=trueIn PDF document text
    • http://xovufavon.rf.gd/kinds_of_adverbs_worksheet_for_grade_3.pdfIn PDF document text
    • http://gunuguduwurenog.epizy.com/lukepalovejedajixupuku.pdfIn PDF document text
    • http://zefixufedinokas.epizy.com/newborn_baby_boy_images_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/992ca226-14b9-46d4-9cb9-cf7eda029643/pistol_training_concealed_carry.pdfIn PDF document text
    • http://filirepakej.epizy.com/49167791714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8aadf67-3711-46c4-93a0-37da73f06400/tufef.pdfIn PDF document text
    • http://pixagikaw.epizy.com/63526121409.pdfIn PDF document text
    • https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_0c265a7384df4c0aa0209eefcb1852bd.pdf?index=trueIn 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_off0000ccac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAC 5164 bytes
SHA-256: cdf4f544422f6771fa7e971ca37f29fb53bb8c59604e9eacc391337a9382f6e0
font_01_sfnt_off0000de40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE40 10668 bytes
SHA-256: d1e0b35b595648792afb972afa473b9b9206141951ac0f2d87c9b548cd575664

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