Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c6bc834071613b…

MALICIOUS

PDF

42.1 KB Created: 2020-10-01 18:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ef0efea8d9e5996bcd7c2c63527c29fd SHA-1: ed2df6f0f0ccba81da0655a8908172b05827dbfa SHA-256: 74c6bc834071613ba4ce24c0c3626c0f12e95b33a50b8b62ee41a57be7c00c1c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://cctraff.ru/strik?keyword=boolean+algebra+calculator+project+pdf In PDF document text
    • http://files.glp-lawyers.com/uploads/1/3/1/4/131453657/4910b43.pdfIn PDF document text
    • http://files.potomacfallsdrama.org/uploads/1/3/1/1/131163782/kaxawuwuta.pdfIn PDF document text
    • https://site-1036925.mozfiles.com/files/1036925/zikeja.pdfIn PDF document text
    • https://site-1037828.mozfiles.com/files/1037828/30041121616.pdfIn PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/59061722070.pdfIn PDF document text
    • https://site-1039907.mozfiles.com/files/1039907/kopipeli.pdfIn PDF document text
    • https://site-1036686.mozfiles.com/files/1036686/wifenaxirobarobexaresoku.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/75ee30c1-d15f-4a25-9af2-4838a490e353/rubepaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62451149-0504-49ff-8715-10788ba785c6/maveminalomefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d44933c7-cff7-4201-94d0-0ae75431a15e/zadel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab1fe64-e3b7-490b-852e-b985b2e5195f/85032204291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3e6fcc8-0d4b-4fb2-a59f-51b348f559c2/jarajawanironajivekav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/494e8b4c-9439-4310-927b-a6c35e2871f3/52482772237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d45730-fe0f-4a3f-8839-f5a9386feefe/79301786703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1005012-5fe9-4476-8c1f-d83c5797717a/disafimof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/511bd3af-fb02-4eab-b3c0-42d01a42befb/wodarajizotilen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12c102e5-17db-40fd-8838-b69eab74028f/17089197317.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D4 5412 bytes
SHA-256: 578c9ae2f481e5c7da7fcf2624c2ab25f37ef712cbe128502423c58aab2e0a52
font_01_sfnt_off0000784f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x784F 10112 bytes
SHA-256: 4e54a7668775796e30fe77329292181fc37b62c6336af9872ddb87039348aed2

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