Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c7e9c19568b8c5…

MALICIOUS

PDF

54.9 KB Created: 2020-11-09 09:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: fdb8171c03b261387abd2a818ab0acab SHA-1: 340c892e0fb1e96bb30a993ca70044822a123dc0 SHA-256: b7c7e9c19568b8c57482d93acba8a0648a3bc694b655acdb6d1bfd207a1e19a8
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://trafficel.ru/aws?keyword=quotes+on+home+owners+insurance PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372376/normal_5f954814bb43b.pdfIn PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/14d4f3eee25386.pdfIn PDF document text
    • https://vogizezadu.weebly.com/uploads/1/3/0/8/130814341/xuwiromerazulat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rabenelodi.files.wordpress.com/2020/11/angielski_wiczenia_czasy.pdfIn PDF document text
    • https://metibuvup.files.wordpress.com/2020/11/85378680058.pdfIn PDF document text
    • https://pexajovuxam.files.wordpress.com/2020/11/rowalinejufug.pdfIn PDF document text
    • https://fivepapovite.files.wordpress.com/2020/11/bitsat_2019_question_paper_with_solutions.pdfIn PDF document text
    • https://kugudad.files.wordpress.com/2020/11/1717688781.pdfIn PDF document text
    • https://zudaxobati.files.wordpress.com/2020/11/givemonuvazepunabu.pdfIn PDF document text
    • https://woxawekobati.files.wordpress.com/2020/11/satasaxutoxopavaranib.pdfIn PDF document text
    • https://kugudad.files.wordpress.com/2020/11/dumfries_and_galloway_standard_death.pdfIn PDF document text
    • https://sijepafaji.files.wordpress.com/2020/11/living_poor_with_style.pdfIn PDF document text
    • https://nizowowe.files.wordpress.com/2020/11/midesifitir.pdfIn PDF document text
    • https://pufewureda.files.wordpress.com/2020/11/fimasu.pdfIn PDF document text
    • https://lifokeveju.files.wordpress.com/2020/11/55843553373.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_off00009720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9720 5160 bytes
SHA-256: a632f42c7784cb52b44b48380449fb12aa817ee88a0397ebf93c46adccea3b6b
font_01_sfnt_off0000a88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA88E 11176 bytes
SHA-256: 6e0c35da82ff9b3c54033549fa2b2508a404350fdb56faa296fe2aabed60afb1

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