Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a96d6faf70b7e44…

MALICIOUS

PDF

78.8 KB Created: 2021-02-17 11:10:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: f90a5b3093aaa6bc079f387fb83af657 SHA-1: ee816974e5372c9559557801493a387f8d30bd12 SHA-256: 1a96d6faf70b7e4413da9e892475591dc9c0c3fc71e1d012f542c0a36e9df273
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to direct the user to a malicious site, potentially for credential harvesting or further payload delivery.

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://maypoin.ru/strik?utm_term=the+easy+way+to+stop+smoking+allen+carr+full PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453100/normal_600794ca3e0fa.pdfIn PDF document text
    • https://zoguripan.weebly.com/uploads/1/3/1/0/131070442/f3cf5150490.pdfIn PDF document text
    • http://natiral.space/fusionner_plusieurs_documents_en_15nv2b.pdfIn PDF document text
    • https://xunumiselodaz.weebly.com/uploads/1/3/0/7/130775676/ed04ea65afc0.pdfIn PDF document text
    • http://agreevudb.rest/welding_handbookbts6o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450036/normal_601233edbddf7.pdfIn PDF document text
    • http://cabinetshub.xyz/723731828106m0tk.pdfIn PDF document text
    • https://buxogenawake.weebly.com/uploads/1/3/5/3/135385170/3906163.pdfIn PDF document text
    • http://copyright-help-center.com/64319777843vphvb.pdfIn PDF document text
    • http://mandarin-fruit.space/aloha_browser_lite_premium_apkvkh7v.pdfIn PDF document text
    • http://meblik.su/77296908255hdgs3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451021/normal_602153c690dd1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/dexozisalarutugegulibut.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/righteous_bold_font.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_off0000e969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE969 5636 bytes
SHA-256: aed3014a52200923994af9c85f811011db4ee769d1ab2b3d9a6e2fd255f73e28
font_01_sfnt_off0000fc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC81 2292 bytes
SHA-256: 83d802f46930040166565ca76e1bf8201332aaf1798aef755438e19ccaa16775
font_02_sfnt_off000106e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E2 11584 bytes
SHA-256: 29a6cd3a3e50c289154d517029686fe126beff3d3ddf8c7a57da61aa561a4569

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