Malicious PDF — malware analysis report

Static analysis result for SHA-256 66625419f85458a8…

MALICIOUS

PDF

64.4 KB Created: 2020-12-27 15:35:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 83d6dfe5dc9b42a8f4b954031572515c SHA-1: ed3c58ecb90db80cfd373a44a64192b66b596066 SHA-256: 66625419f85458a8471401d9b9449c0c58787a9d6f3f3fd6fb90e388bcd0a823
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to 'trafffi.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely to manipulate search engine results or direct users to malicious sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/aws?utm_term=walmart+corporate+sustainability+report PDF link annotation
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/zexibejupubojusox.pdfIn PDF document text
    • https://bemaxeviliw.weebly.com/uploads/1/3/4/4/134482954/2802795.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/iFAjeKr/world_market_near_me_closing.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/35271a77-2a6b-41e1-b46a-bff168c453e9/26631656417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf2cbc6-ba96-4802-9b0a-9f33f8f9306c/sekudoxera.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/61096211444.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/mefufu.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/68026308907.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/old_roblox_simulator_website.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/mother_s_day_worksheets_for_preschool.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_off0000c0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B6 5332 bytes
SHA-256: 8ebedad1d8d428575b96a8c2e6341b9ab498c66d32afc1fa4395ddfd1430522b
font_01_sfnt_off0000d2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CD 10044 bytes
SHA-256: 7388b4337c74a3c310864c66f304b33bf396a545596481efcd752c68ae9d41bb