Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf0ab40c11e9a0f8…

MALICIOUS

PDF

42.9 KB Created: 2020-10-09 08:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 3f72a93d939196f4d88ce15cf4ada5cd SHA-1: 5b639c489d9de6e6d44a7d477eb10a7a695a4176 SHA-256: cf0ab40c11e9a0f8fe804b1ee1306792c19d371fc7b25a6e7ea9ea6a86a8a78e
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://ttraff.club/pify?keyword=flamebird+and+nightwing In PDF document text
    • http://files.nydiamondcenter.com/uploads/1/3/2/7/132740281/10b9c.pdfIn PDF document text
    • http://files.icomos-lietuva.org/uploads/1/3/1/4/131438211/vijol.pdfIn PDF document text
    • http://files.widehorizonsretreat.com/uploads/1/3/2/8/132814651/kiwalufenasevar_foxije.pdfIn PDF document text
    • https://site-1040610.mozfiles.com/files/1040610/15707597655.pdfIn PDF document text
    • https://site-1043218.mozfiles.com/files/1043218/josalovewaxafus.pdfIn PDF document text
    • https://site-1040164.mozfiles.com/files/1040164/35547938810.pdfIn PDF document text
    • https://site-1040238.mozfiles.com/files/1040238/52581788421.pdfIn PDF document text
    • http://sunozufa.costaruralsupportnetwork.org/uploads/1/3/0/9/130968921/1c4493b62283b8.pdfIn PDF document text
    • http://files.adamscomputerclass.com/uploads/1/3/1/8/131856590/6328162.pdfIn PDF document text
    • http://files.tilburgmun.com/uploads/1/3/1/1/131163705/kinibapabasowap.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/40688718-b14c-4736-9bfb-c7d20eb74d21/58611316024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea52619f-02a6-44a8-b61e-71a0e2f8b093/16358291570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55db99c1-905d-4465-a736-74a462538d9d/97581372105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11e173d8-1de0-4dac-a32f-9a69298ab721/zunojipidoxizupibekigenum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aedb6154-1c8d-42ea-a22f-06882c960c04/45722297969.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_off00006a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7F 5248 bytes
SHA-256: a7fc066827ad76b58685f7f56bf535b2fcdcc36a2a61fa573fc05a2c9ad61a7c
font_01_sfnt_off00007c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3A 10032 bytes
SHA-256: 0659211e8905e28e274c5a43d32c2f23222e05e7f677e2f63dfc87e4e990497a

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