Malicious PDF — malware analysis report

Static analysis result for SHA-256 187bf46dc0138d73…

MALICIOUS

PDF

76.2 KB Created: 2021-01-06 16:26:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 145aa35c3a7d872f9b776e7072cb23c1 SHA-1: f385cc5daa67e28eb9c173b2540329f3c078f8c4 SHA-256: 187bf46dc0138d73066600aa0e9b11c7c8f93864dfe3d15c5d5a617ca031d727
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to contain search terms related to products, likely as a lure to disguise the malicious intent.

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://trafffe.ru/wb?keyword=rechargeable%20batteries%20with%20charger%20walmart PDF link annotation
    • https://xirabefutabo.weebly.com/uploads/1/3/5/3/135323672/1876017.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/guwonajikawow-tededireri.pdfIn PDF document text
    • https://cdn.sqhk.co/togodawexu/idYgjHm/skyscraper_demi_lovato_karaoke_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/baduvezemu/eibkthj/91047089313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f8715cf80c22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456663/normal_5faebb981a5af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489734/normal_5feed007ddaa4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450243/normal_5ff02d62ada7f.pdfIn PDF document text
    • https://lafefozusut.weebly.com/uploads/1/3/4/5/134597047/4164144.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414488/normal_5febb97d9b41d.pdfIn PDF document text
    • https://vagibize.weebly.com/uploads/1/3/4/6/134618654/7287328.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/fgijghi/how_can_i_download_bet9ja_old_mobile_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457586/normal_5fda6c1e7e733.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/sovezolosokukan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_5fa9d3d84bcb7.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://uploads.strikinglycdn.com/files/e5615f46-d145-4b52-a5bc-c31f3b9b0234/49673088124.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_off0000e0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C8 5024 bytes
SHA-256: 7f098fdd703d81456bdf0b3063a3ef6e01f8260167b479a43ad0c5481102fd1d
font_01_sfnt_off0000f1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EA 10316 bytes
SHA-256: 2e461101271f7270cfd16829677d1eeecdacad5dd44c79b3b6a6ee5243ab7f61
font_02_sfnt_off0001154d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154D 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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