Malicious PDF — malware analysis report

Static analysis result for SHA-256 c61a3ced816396df…

MALICIOUS

PDF

60.3 KB Created: 2020-11-24 05:15:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a6dff6f69ed18bc57a54cc6361bfaaa4 SHA-1: bcd239f18f22b1eaea4ecf754369b1b2044ced31 SHA-256: c61a3ced816396df1ac2eb99dca0f15b1ce52dbe9c420e20d79c2b7863d81762
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many pointing to disposable hosting services, designed to redirect users to malicious infrastructure. The primary redirector URL identified is 'https://traffking.ru/strik?utm_term=launching+new+ventures+8th+edition', which is flagged as malicious. The document's structure and link farm behavior strongly suggest a phishing or redirection campaign, likely intended to deliver further malware or lead users to fraudulent content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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=launching+new+ventures+8th+edition In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_5f914b09a5aa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421466/normal_5fa6dedc6c401.pdfIn PDF document text
    • https://turexebino.weebly.com/uploads/1/3/4/2/134265835/xebimugo.pdfIn PDF document text
    • https://dimeropudefopo.weebly.com/uploads/1/3/4/7/134742885/wogutudax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450047/normal_5fa850c226f5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5fbb1f558c33a.pdfIn PDF document text
    • https://xumodaniteged.weebly.com/uploads/1/3/4/4/134480563/pezisunitasiro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418781/normal_5fa2d357c00c4.pdfIn PDF document text
    • https://keruzexutebimoz.weebly.com/uploads/1/3/4/3/134310977/1532042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_5fa166337d8c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412900/normal_5f9bd0a81e022.pdfIn PDF document text
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/9183651.pdfIn PDF document text
    • https://bukojawuwo.weebly.com/uploads/1/3/4/5/134508808/falekekakobuv-miwabanarow.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/5bc45e80-a68a-421f-826a-27b428ccf143/66729373448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4396391d-ee2e-469d-901f-76619b2947be/latopilejowovoxulinutekab.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_off0000b0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0BD 5456 bytes
SHA-256: fd84bf55213849f9fcd217137af4ad9415424c14f4c812daf70b473af2e04a35
font_01_sfnt_off0000c35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35B 9572 bytes
SHA-256: 614307b6aad8cf25c6e3c887e1150dae86f057269b97d87aed918be8d9aa2a5f

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