Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d1e51eb1c7d25b…

MALICIOUS

PDF

40.4 KB Created: 2020-11-07 03:52:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 84e51b3ffdef5e2f21d5364a91cd793b SHA-1: b623d92e71e6748c7ae233d1d7aa869e6ecabc3b SHA-256: a6d1e51eb1c7d25bf555a08c70cd30379e2e7a2f4bc3ee35f82898e4bd9cdd97
146 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/123?keyword=o+riley+return+policy PDF link annotation
    • https://rifituxajigibik.weebly.com/uploads/1/3/4/5/134519767/rezuzadagoti.pdfIn PDF document text
    • https://ruwotepileta.weebly.com/uploads/1/3/4/4/134493455/jiloluwu-baziwodul-veladaxax.pdfIn PDF document text
    • https://naletonuve.weebly.com/uploads/1/3/4/3/134381452/velezokave_barufeb_lugonizanaruvev_wizelalikusex.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/zolud.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/ffaf3b29e8eed9d.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/7967770.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/f4455c7c2dea9a2.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/afa936094.pdfIn PDF document text
    • https://woniwisupu.weebly.com/uploads/1/3/4/2/134266019/dewukeluna.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/3584334.pdfIn PDF document text
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/kamige.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/b0eaf3ee05c.pdfIn PDF document text
    • https://metumarexidema.weebly.com/uploads/1/3/4/5/134591821/134d6dc385c41f3.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/9ff3c7e4-9001-41a2-b254-8f9c5708dd67/crown_forklift_error_code_309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab314414-b7c0-495f-9edf-e85ce07f4d85/rituduvalamimidijupepepo.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_off00005f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7B 4668 bytes
SHA-256: 855e6412b9ca3946b0671d2544a6d4a7d28e17a1453d9cbdcf6afce2ba8a0dc0
font_01_sfnt_off00006f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F75 11064 bytes
SHA-256: 099be08ee3bd04485d22775cdf0c145e63bec3c9f8910b8167a9cab1fd17aaca

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