Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67947b10c4cce8a…

MALICIOUS

PDF

71.4 KB Created: 2020-11-18 05:32:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8e710d4078ce304e823e34df8d41c27f SHA-1: 9d9a8835c598fc84ae4409a45ddc871ec4c6e12c SHA-256: a67947b10c4cce8a6a8c810f6206212e2c6c8284bee65a57cb8d322cced26ed6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, characteristic of a link farm designed to manipulate search engine results. One prominent URL, 'https://trafffi.ru/123?utm_term=horry+county+mugshots+june+2020', suggests a lure related to mugshots. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a phishing or SEO manipulation tactic.

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://trafffi.ru/123?utm_term=horry+county+mugshots+june+2020 PDF link annotation
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/xurejetexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_5fa1dc1e7e137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404502/normal_5f9f5f51d82b6.pdfIn PDF document text
    • https://bobilemako.weebly.com/uploads/1/3/4/7/134733435/megevimu_lemumogavu_taradibuka.pdfIn PDF document text
    • https://jorimedazaget.weebly.com/uploads/1/3/0/7/130738946/momobubune.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/wowabaxisefidet-nikuvajekibesim-napoxalapa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3599040b-4cf3-4172-954b-1577b4e7ef06/double_entry_bookkeeping_class_11_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc4bcb9-1cbd-407f-9648-7f96b42a70e1/69821643375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5ae878-1971-4892-a941-d7be5471c42e/lyman_shotshell_reloading_handbook_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc112b04-092d-4f67-a74e-c583e7304e70/besufizadejovuvoz.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/gta_vice_city_apk_pure_download_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ba8107-749e-40be-8211-1c82a39e780b/rixerugugoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49bdb6fc-9f69-4f72-9326-1a406724ad4a/71201903699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87305d3c-2631-40f8-a220-f8d70826c78a/5348486278.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_off0000cdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAC 5384 bytes
SHA-256: 3c5c5014247345b9079aa657f5ff26a623c960972c7d1968ff0bd7f8fa15c6f4
font_01_sfnt_off0000dfe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE7 2748 bytes
SHA-256: b36adea9012be2f2fb21ab8695503e5b7dfaf8c25da1687482b63b8f932afcb1
font_02_sfnt_off0000ec00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC00 10764 bytes
SHA-256: d787c45527737e820e58c07beef7d9b66d09ec1d1d061792d4af85c14785d899

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