Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3b6cf41d48342a…

MALICIOUS

PDF

75.2 KB Created: 2020-12-31 14:39:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8895f23727fbb84af31ccc2bfd5869a8 SHA-1: 5dac213634b941229ac64627af7b589f9e997585 SHA-256: 7f3b6cf41d48342a6ce568864ec529ddb2cc1c7d2f9d48e7e647200c301a0d00
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and likely phishing-related. It contains a mass of external links, with one prominent URL pointing to 'trafficel.ru' and a query parameter suggesting a lure related to motorcycle helmets. Although no scripts were explicitly extracted, the PDF structure and the presence of numerous external links strongly suggest an intent to redirect users to malicious websites, likely for phishing or scam purposes.

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
  • 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://trafficel.ru/123?utm_term=predator+motorcycle+helmet+white PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483337/normal_5fea0bf5b26eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473044/normal_5fec55797dd57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416493/normal_5fd663d139cf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495244/normal_5fbf2fb3b1625.pdfIn PDF document text
    • https://tawafijagipuju.weebly.com/uploads/1/3/4/6/134684871/4644470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374956/normal_5fc200fd24726.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://uploads.strikinglycdn.com/files/406b665e-09ae-4253-a9b7-fadf11b830f3/is_230_d_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/alaiye_sitralaye_mp4_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/634ff30c-5771-48e5-a959-83c2630fc858/20963569426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be4066f9-41b8-4a58-8cf4-245746ca68b7/boost_e_wallet_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/63200290814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5711b39d-765d-4aef-875b-4a2d193c4c3b/garbh_sanskar_book_online.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_off0000db5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5E 4880 bytes
SHA-256: d3c7eae0dd7f00716fe66ab5aca232898de8ab0373b9f5984d5525747abf4a52
font_01_sfnt_off0000ebfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFD 11112 bytes
SHA-256: 11f6cc328e60b093b5cc5cf7ec99399c100e4f24dd19c355307743e6abcc442c
font_02_sfnt_off000111c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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