Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d63ccbfd53d61d…

MALICIOUS

PDF

82.1 KB Created: 2021-02-25 20:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2d8c3ca3ce308b663845e4183f784c3e SHA-1: b1fc4d1f33f66d556063b860b8c80ee29454590a SHA-256: f0d63ccbfd53d61df54b4db11f9bcd0340eea0458e35bf067d5cbaf53c895570
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to potentially harmful content or for SEO manipulation. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=may+all+your+christmases+bea+white+svg PDF link annotation
    • https://megopupe.weebly.com/uploads/1/3/1/1/131163834/d5ef6ef84816b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402503/normal_5fda3638ab6b3.pdfIn PDF document text
    • https://sagiwotagemo.weebly.com/uploads/1/3/1/8/131871993/d96bf4ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488137/normal_602a413d784d5.pdfIn PDF document text
    • https://jamekefexufi.weebly.com/uploads/1/3/4/8/134866820/gixemipijojid_tilezotij_xuboru_dezopem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445338/normal_5febb4f2827a2.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/bofov-wudugenevima-ruxuti-widizur.pdfIn PDF document text
    • https://wiputexalivit.weebly.com/uploads/1/3/2/7/132740767/1071426.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/18562933614.pdfIn PDF document text
    • http://ijmalan.xyz/110336561384s1wh.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/dupumuxanuvorelozosewo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367947/normal_5fdf735f61474.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bodegifu.atwebpages.com/mary_rowlandson_a_narrative_of_the_captivity_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/division_facts_worksheets_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/mekavit.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/solubility_and_miscibility_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/potimujijidawas.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA61 5612 bytes
SHA-256: 7871bce958e4173ad6706ee9c0442155f563726da211694e87ab92159c976eae
font_01_sfnt_off00010d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7A 15020 bytes
SHA-256: 57c43f0a1671843e76d75299e4d2db901554e90ab049a2333018c4b612b3c365

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