Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce0ddb639c92398…

MALICIOUS

PDF

68.5 KB Created: 2020-11-24 08:12:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2c6fdb2c257d89b5c0dcc76a2a6a599c SHA-1: 75a11c55685568045c67583a9a9898fd77e53e94 SHA-256: 8ce0ddb639c923983303013e4b045e64ad3da9354d4269a528f5b8705f325ff2
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. The embedded URLs and the structure suggest an attempt to manipulate search engine results or redirect users to malicious sites.

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://trafffi.ru/strik?utm_term=civ+5+map+size PDF link annotation
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/4173365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f88c732c2364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470837/normal_5fbaf871c7c58.pdfIn PDF document text
    • https://xomowozijirogap.weebly.com/uploads/1/3/4/6/134667332/1783020.pdfIn PDF document text
    • https://xaxovalalek.weebly.com/uploads/1/3/4/0/134040353/d4aa5f8848f7.pdfIn PDF document text
    • https://xejibojap.weebly.com/uploads/1/3/4/3/134310503/f6fa0ee00df4.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/19267c60a9b961d.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/8fbe3736-c023-4f9f-8c93-cdaab824271a/19739305676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55a2442a-6ce3-4f88-a672-ad19b271567d/41759283267.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/furerifuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7735bd69-6b4e-43db-81a1-e3e313cd7591/hermann_hesse_narcissus_and_goldmund.pdfIn PDF document text
    • https://s3.amazonaws.com/betimugi/xozamegavazalapiruv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf9f6ba2-21e8-4a76-acc6-90c18093a118/paul_reveres_ride_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19b4ccc9-10d1-417a-b751-9f0a6fd3283f/folevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b42fca0-a404-4b3f-86bf-57ea94013829/46225662687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d1c628c-f9a3-47ee-b7e5-79d1e07f85b6/manometro_tipo_u.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_off0000cdaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAF 4976 bytes
SHA-256: acbb3c836e613f3b1823d911163c843fc62469b0a60c4d713d8842dd8bff1504
font_01_sfnt_off0000de9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9D 11372 bytes
SHA-256: b7233f9093f58f42abe7e2a163faacaa84ad58fbca7bb6a3abd8f10f29048c23

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