Malicious PDF — malware analysis report

Static analysis result for SHA-256 29221f400fff43b3…

MALICIOUS

PDF

78.8 KB Created: 2020-12-30 19:30:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: deca219370d2d58e041a658c037e4ce9 SHA-1: 2c170241af66ef8847c4b0d9e7508c31b5b6b11a SHA-256: 29221f400fff43b3debe830e428a945b19e4953e6891d38fe468ba308d48876a
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. One of the primary URLs, 'https://trafffe.ru/strik?utm_term=philadelphia+recorder+of+deeds+forms', indicates a potential phishing lure related to official forms. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious or spam content.

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://trafffe.ru/strik?utm_term=philadelphia+recorder+of+deeds+forms PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5fab5fa418b38.pdfIn PDF document text
    • https://zukigepuzena.weebly.com/uploads/1/3/4/5/134593101/a3863b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421939/normal_5fc80d434a89f.pdfIn PDF document text
    • https://fibimijisu.weebly.com/uploads/1/3/4/4/134461798/rojaduwabowiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5f8c7aeced5c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380522/normal_5fcce551934b5.pdfIn PDF document text
    • https://tataberoxem.weebly.com/uploads/1/3/0/8/130874397/mipedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481819/normal_5fb77a8ef145d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453729/normal_5fb7d9b688e5e.pdfIn PDF document text
    • https://cdn.sqhk.co/sopaluwokaja/g8ZhdN9/funar.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279107.pdfIn PDF document text
    • https://vesekukoluvili.weebly.com/uploads/1/3/4/7/134759730/xovutaboboxuruzatul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_5fb4a3d06e720.pdfIn PDF document text
    • https://nebutoribuve.weebly.com/uploads/1/3/4/6/134615115/6462304.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://s3.amazonaws.com/zetare/relative_clauses_exercises_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/autocad_2015_crack_free_64_bit.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_off0000e99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99C 5000 bytes
SHA-256: f9bbea2993353ba39c5f1e0e0b750642bf8488211e848debee757dae81aec9da
font_01_sfnt_off0000fa8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8B 10900 bytes
SHA-256: 32e2529bd4322a9ba15aea38b9bbf42e13ccb60a685a98cda7def5385a802988
font_02_sfnt_off00011fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDD 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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