Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a1af6654afe191…

MALICIOUS

PDF

66.4 KB Created: 2020-12-18 05:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f799f64fc39108102d104ed278cf8215 SHA-1: b8b954dcc202d65726872e6148d91f28d63f4907 SHA-256: 46a1af6654afe1919f11929d3b973ff0dc9cf74d6a95b70f8723fb1db0068fe8
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafftec.ru/strik?utm_term=bissell+dirtlifter+6+manual PDF link annotation
    • https://reganumezeku.weebly.com/uploads/1/3/4/7/134749319/zabuxineruwex_kidefikegituxo.pdfIn PDF document text
    • https://gemiwanot.weebly.com/uploads/1/3/4/4/134495393/3812011.pdfIn PDF document text
    • https://rujasuxok.weebly.com/uploads/1/3/1/6/131606047/6fa19b9cb697e13.pdfIn PDF document text
    • https://toraboretopupu.weebly.com/uploads/1/3/4/7/134769369/mebusemojok-tularivad-merikowadu.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/wotitir.pdfIn PDF document text
    • https://kixovomez.weebly.com/uploads/1/3/4/8/134868331/8ae8f793cfce6cf.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/793bbf0c-9091-4e2c-be5c-8be3cbcc0534/43253341755.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/86895453693.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29c05a3bf4b14abb4035c/t/5fcbac78393ce47356388faf/1607183481960/burning_basketball_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/voxazam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34acd242-a27f-4866-b785-8bd2c11a20b5/mockingjay_summary_shmoop.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/18989710598.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_off0000c599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC599 5256 bytes
SHA-256: f994b38d48d8aa1a66b03d89ad6fd5381b24250b2a10ee5c79673bbdf1cfac0d
font_01_sfnt_off0000d761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD761 11112 bytes
SHA-256: f10b34fb382455c9bb96331a50cb02ac8ef69bfea9f6da63b0c00dba5dc07850