Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f2371312a0d065…

MALICIOUS

PDF

70.0 KB Created: 2021-01-03 02:34:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 001571428b899732e401d8f7cc2b9c58 SHA-1: 32d638e89b80deee060555b439e5ebf762b9070b SHA-256: f6f2371312a0d065b2c459d6b8cd6e0f11a39c1a418f504595550511c5769ad6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO poisoning tactic. One of the primary external URIs points to 'trafffi.ru', which is suspicious. ClamAV also detected this file as 'Pdf.Phishing.Trojan', further indicating malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious sites.

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://trafffi.ru/aws?utm_term=audit+report+format+icai+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f873fc4a5b8b.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/gggUfhd/vanijijubogagodofe.pdfIn PDF document text
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/suxux_sotakumox_vowekifebigipip_lobir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_5fa2bd8f1cad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408713/normal_5fba6d99f3a65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480588/normal_5faa197b40096.pdfIn PDF document text
    • https://cdn.sqhk.co/busosuwik/HzUgd0X/run_hulu_summary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417137/normal_5fdfb06b1c807.pdfIn PDF document text
    • https://cdn.sqhk.co/tokititagiwe/Th4sQuo/redream_download_mac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383446/normal_5fad4954e5f39.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/484e84da-cebe-47c1-aaa1-757b36f76b47/charles_towne_fermentory_instagram.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/38496145305.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/choices_stories_you_play_mac.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_off0000d517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD517 5560 bytes
SHA-256: 1ff1ba896173ebc73f82f3879c9fb9a59e7e62d4be8e17639fded3f2605a5a9c
font_01_sfnt_off0000e7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EF 10356 bytes
SHA-256: 9ef23eeb21ba158f67d803cf18273743d827a5853bf0311f41e6e484183a5045

Open this report in the interactive analyzer, or submit your own file for analysis.