Malicious PDF — malware analysis report

Static analysis result for SHA-256 94853c18f5623b24…

MALICIOUS

PDF

71.4 KB Created: 2021-04-01 19:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4df7a3a3b01dd9e848437c3fed9dd167 SHA-1: c3d8c1e4cf2dd63dc1700c3d5be26b9939f4e1ba SHA-256: 94853c18f5623b24fae48118f3f4ccacd292e368084d4639ae992d2e56ed0908
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/award?keyword=calculus+textbook+download+pdf PDF link annotation
    • http://tadefog.medianewsonline.com/asi_hablo_zaratustra_federico_nietzsche_resumen.pdfIn PDF document text
    • http://meetchat.space/solving_quadratic_equations_worksheetmuoch.pdfIn PDF document text
    • https://cdn.sqhk.co/pugudanirav/tv3jMjd/pibilitiwuledokagurit.pdfIn PDF document text
    • https://severuzilun.weebly.com/uploads/1/3/4/7/134710190/mezirazumipe_zakabaduneme_jesed.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/571447714892k3yl.pdfIn PDF document text
    • http://widaxaruko.mypressonline.com/black_s_law_dictionary_free.pdfIn PDF document text
    • http://sreda.city/alpha_twin_citiesbyz72.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/gefthhd/wofefibusadejafimexu.pdfIn PDF document text
    • http://gravkamen.ru/free_visiting_card_psd_templates1bucr.pdfIn PDF document text
    • http://makamar.xyz/answering_someone_else_s_phone_at_work4rzbz.pdfIn PDF document text
    • https://digexuvin.weebly.com/uploads/1/3/2/8/132814990/4895328.pdfIn PDF document text
    • http://tiktokfrance.fun/hilton_onq_help_desk_phone_numberlcal1.pdfIn PDF document text
    • https://kibimibenafozo.weebly.com/uploads/1/3/5/9/135979164/5238890.pdfIn PDF document text
    • https://kiluzamomumu.weebly.com/uploads/1/3/5/3/135344913/vetojo-roxun-naxopoxasegarim.pdfIn PDF document text
    • https://powudeli.weebly.com/uploads/1/3/4/7/134772307/c4ca72.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/6a108e3b-dd09-4aa0-9b90-5377c3be7a3c/2292592550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df936419-86dd-4650-8e66-27f20607460c/9428619596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a0a2ba-1e17-4a3a-b1a1-bc53f33b5340/darap.pdfIn PDF document text
    • http://nopugorib.onlinewebshop.net/narakanepifip.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/briggs_and_stratton_625_series_190cc_parts.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_off0000d9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E0 5324 bytes
SHA-256: 513cc3500841d10a8a027b2004b8907de0e6c1de0792d47f240fe687d5c647ad
font_01_sfnt_off0000ec1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1E 10832 bytes
SHA-256: 78f1d7172ed0a6330a80eb161a5f25d49d86658b2dd737ac5ed2c75b3866e87d

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