Malicious PDF — malware analysis report

Static analysis result for SHA-256 15117cd09335b101…

MALICIOUS

PDF

74.8 KB Created: 2021-06-03 14:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fbfa2d5b007970b31ed0c8ff327efcc7 SHA-1: 5bfa404ee0fa69d8c8f54d60aefacdd8ca0ae136 SHA-256: 15117cd09335b101a01e903c08fcbfd2133b7a935bd01f1dca94c35be0e95e0a
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links to disposable domains, masquerading as a guide for the game "Hearts of Iron IV". The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates that the PDF is part of a link farm hosted on disposable domains, strongly suggesting a malicious intent to redirect users to potentially harmful content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://botokaw.ru/123?utm_term=spain+guide+hoi4 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420747/normal_5fe3424f4436f.pdfIn PDF document text
    • https://pilitopamazi.weebly.com/uploads/1/3/4/3/134313639/230e3e.pdfIn PDF document text
    • https://sunowakodi.weebly.com/uploads/1/3/2/8/132814938/radux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448556/normal_5fda2fa7293b9.pdfIn PDF document text
    • https://bumewotosebixab.weebly.com/uploads/1/3/5/2/135298585/gupixedolo_ledep_fuwidakefowo_ziluzekixijavu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427080/normal_5fcd9774dea55.pdfIn PDF document text
    • https://tetavezodumop.weebly.com/uploads/1/3/4/6/134645623/7386041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_603e7623d1c40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401989/normal_6054aeaad7f94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460970/normal_6007620790805.pdfIn PDF document text
    • https://dapijapivabug.weebly.com/uploads/1/3/4/3/134338952/safenoxilixax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415962/normal_60508ba4f2767.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/09efdee1-6485-426e-bd31-2ef07c58500f/soxugizufivirotewu.pdfIn PDF document text
    • http://vazesuna.pbworks.com/w/file/fetch/144506523/93091404622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fdb1871-6112-4d02-8768-0be323ecc539/kizadu.pdfIn PDF document text
    • http://pajinap.pbworks.com/f/71042091568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99b4656c-8690-46a8-a375-be40e6231e9a/fefofevazisezovonakew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85e71f77-86da-494c-b0ac-36ed8566f422/painting_with_a_twist_ideas.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_off0000e5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F6 5108 bytes
SHA-256: 4986b6cd8e5eb09afc1a0162a6ee2d5fce7e06887df46c0af8ec5470f9797de0
font_01_sfnt_off0000f75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75A 11420 bytes
SHA-256: 37950ddf21301cd430810212ebd4052fc927a740e60e70304908c89f83eb5c19

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