Malicious PDF — malware analysis report

Static analysis result for SHA-256 4628a65c13c544b6…

MALICIOUS

PDF

71.3 KB Created: 2021-02-05 20:17:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 78b247f3e825cc811e7478d12ecf74d8 SHA-1: cf45bfbb18f3dc983beca0c5cc58ca9e0b87343b SHA-256: 4628a65c13c544b6d0006466edc9354488341ea22824314989307085d8ae0b4a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, indicative of a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful content.

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 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.
  • 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/123?utm_term=mirror+lil+wayne+lyrics+traduction+fran%25C3%25A7ais PDF link annotation
    • https://ruwatavefi.weebly.com/uploads/1/3/4/7/134704280/bukene.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382780/normal_6009409de0b21.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/gghbIgj/2336855015.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/ggieCjh/xixowexurinegukugojotos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366978/normal_5ffefe1291be8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461207/normal_600a53036cba5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417805/normal_5fe9707e68007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468551/normal_5fe80251c0d6a.pdfIn PDF document text
    • https://cdn.sqhk.co/daxonotetil/QgcjjSQ/27849826509.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369165/normal_5ff408080e973.pdfIn PDF document text
    • https://cdn.sqhk.co/muresogus/fgjhcMK/commodity_live_price_apps.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530457/normal_5ff82abca5ce9.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/JTjjFhi/piracy_attacks_gulf_of_guinea.pdfIn PDF document text
    • https://cdn.sqhk.co/kerametunal/ohi4iil/baputoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405929/normal_5fe40d7923539.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/wibedubosateg/90468507458.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/toronto_blue_jays_font.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/zilulakupuwarevesorelidad.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/formation_barman_en_alternance_montpellier.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78C 5396 bytes
SHA-256: 7832fa4d151f415d8d2ba0b79384fab970d742bb6c8c5fa482e139cec6afdf58
font_01_sfnt_off0000e9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 10720 bytes
SHA-256: d363001e1966c29e8356f4d26ebe585056d5489ff7aa221fe0b7853f1eb34cc7

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