Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca16d8df2822ed9…

MALICIOUS

PDF

41.3 KB Created: 2020-11-09 09:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 96f16f46ecc7125a2936369da4fb8514 SHA-1: 2aefb09354c7c38fd630777839ad161a057bbce2 SHA-256: fca16d8df2822ed906043ab97acb16b6c92002565f6e01ccddbd0cf55c6782dd
86 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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/aws?keyword=henderson+county+schools+nc+employment PDF link annotation
    • https://befekibeje.weebly.com/uploads/1/3/4/3/134319248/9622631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372735/normal_5f88a072e88bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f964abe11157.pdfIn PDF document text
    • https://kudumegowejo.weebly.com/uploads/1/3/4/2/134266354/lipesabiganuwigumen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5fa3b931dbc28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f87bace5a9ab.pdfIn PDF document text
    • https://muzokive.weebly.com/uploads/1/3/4/4/134498707/5084483.pdfIn PDF document text
    • https://xefosujusiro.weebly.com/uploads/1/3/4/0/134042031/petozeketemev.pdfIn PDF document text
    • https://vepazigomopu.weebly.com/uploads/1/3/4/3/134398405/berevopemojidovovu.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/010c16ea-3dd5-4e78-a0b5-6494eaa243f0/48084077217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdfb52c6-3e1a-488f-8e4f-e4cdfd697f2a/double_agent_iptv_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/sonubeguromigarilifekuja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc4d1ba8-288e-47d8-8315-4474b34f8537/adventurers_guide_to_wildemount.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/041ded5c-66d8-4e0c-bb44-2f633f4e5ed6/73053162917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4399d99f-be78-4519-9624-688dc246c5de/44468054602.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/successful_definition_thesaurus.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_off00005f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3B 5164 bytes
SHA-256: b4d3d815a190dfffe5353a3cc0cc95bb3769cdc6a32a4e2308c7e1d54e2f2f4a
font_01_sfnt_off000070ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70AD 12264 bytes
SHA-256: dce034ff6dbb3d3b2afaaec4319b775b77296dbd4d5cb52960095122d8f67a05

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