Malicious PDF — malware analysis report

Static analysis result for SHA-256 feff3cc6450aeeb7…

MALICIOUS

PDF

68.6 KB Created: 2020-11-25 18:49:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cd88527e516926c9b7ab61f8148e6b48 SHA-1: ec5816230f5ccef9645f6417c309b4b5a2e5a229 SHA-256: feff3cc6450aeeb79b500d76febee52d9a3b1074149dd799dd776b0a0e2aa92d
194 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, identified as a link farm, with the primary URL being traffking.ru. The heuristic 'SE_INVOICE_LURE' suggests a fake invoice or payment lure, which is consistent with the document body's mention of 'Carta responsiva vehicular pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffking.ru/strik?utm_term=carta+responsiva+vehicular+pdf PDF link annotation
    • https://lakujasoramaw.weebly.com/uploads/1/3/4/4/134400634/4994225.pdfIn PDF document text
    • https://bopiwode.weebly.com/uploads/1/3/4/3/134367631/kimudav.pdfIn PDF document text
    • https://metidesu.weebly.com/uploads/1/3/4/4/134492072/sanesodujor_supudabagine_pomokojapodoma_vusew.pdfIn PDF document text
    • https://metozalolak.weebly.com/uploads/1/3/4/6/134610510/7741262.pdfIn PDF document text
    • https://vezutubiwewo.weebly.com/uploads/1/3/4/5/134507618/sojufanitidame-rufuj.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/0b7701.pdfIn PDF document text
    • https://fonutupo.weebly.com/uploads/1/3/4/7/134727000/diwikab_farotadik_sakuvupazumimab.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/9b773f32ab.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/60ab276b-d76c-43b4-b79c-48006ecd5698/zinumosibafenirejujudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35142392-79f7-4610-9a94-6452f637ff74/77245490880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aade0167-a79d-4a0b-beb7-93bd3d67689c/96268612673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8a9eefb-5418-4e91-a08f-4fabe36cfa8d/81003128909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ec1b4f-cd7a-477f-a04a-145c345807e4/5749082578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ddb4ea3-66b8-4630-a4ed-55c5260e7055/24453570071.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_off0000d2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D2 5208 bytes
SHA-256: ebb702c0372bf7bf383c04d40ec46be997826bf436ab5ccd5107288b460cb9b6
font_01_sfnt_off0000e488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE488 9612 bytes
SHA-256: 11715c20594e86b52b8176575b8b2eb52d24edaba0c289eff6a2557702eb1701

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