Malicious PDF — malware analysis report

Static analysis result for SHA-256 78afefb63db3830d…

MALICIOUS

PDF

70.3 KB Created: 2020-12-18 12:09:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: fc9e78ac602e285b4ca3f1cfbe07ee82 SHA-1: eaea59cce05ffd66e68ff0d3f397ff8e944c75bf SHA-256: 78afefb63db3830d58eeb90184796bc2c9b9bcd2e779cdead7c3db9fdfe3ddc6
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to obscure malicious activity or distribute further payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/aws?utm_term=apple+carplay+ford+sync+3 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4478683/normal_5fba17cd0a973.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415077/normal_5fa1ca3733f92.pdfIn PDF document text
    • https://vatipasa.weebly.com/uploads/1/3/0/7/130775610/rapexagudevo-jobagekune-jarunide.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/rogugagatuf/69142514496.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/android_17_dbz_vs_wiki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc289bc24b06a7eb309ae07/t/5fd048e675f5e504856d2da3/1607485674268/diy_woodworking_gifts_for_dad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86b39ce-6208-4782-a928-4dbfd67dc198/nopanemud.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/xalezejozosenedi.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/31332102833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e83d1f-f659-4329-a130-cab8eaef5ce0/45395079190.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfa9a72f8b574a0f33890/1606220443029/gangstar_vegas_cheat_apk_latest_version.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_off0000d605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD605 5404 bytes
SHA-256: 2e89b10c1ccce53a4555615a75b9e6f4e800afb2d078ea7c11b9ad12af3ad137
font_01_sfnt_off0000e889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE889 10680 bytes
SHA-256: f7303445e0831e6080680af00e601a5f941638878363130f8c82306eb59a9e9b

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