Malicious PDF — malware analysis report

Static analysis result for SHA-256 3360cd396dda47e9…

MALICIOUS

PDF

78.4 KB Created: 2021-04-06 04:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d7d7f9d1604c08387e3fefad0957ea45 SHA-1: b43f123e959834bc0ef0234a5dca29477c7b456e SHA-256: 3360cd396dda47e9be04d1a16211738bd9e89b5e9bbf10b910ae1df17777a993
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML classifiers strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's part of a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://baarspo.ru/award?keyword=case+files+obgyn+5th+edition+pdf PDF link annotation
    • https://juputifewusa.weebly.com/uploads/1/3/4/4/134435955/mudabezivafore.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/kGgijgl/strategy_tactics_magazine_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sefibenip/hhEhGig/16016845909.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/where_can_i_get_thanksgiving_dinner_to_go.pdfIn PDF document text
    • https://cdn.sqhk.co/faruvate/glic8hg/mars_for_the_rich_time_signature.pdfIn PDF document text
    • https://cdn.sqhk.co/kogewole/7xmcXje/41462582527.pdfIn PDF document text
    • https://pugotaba.weebly.com/uploads/1/3/5/3/135302821/teduvugotodevivugiji.pdfIn PDF document text
    • http://vivudanu.scienceontheweb.net/augusto_cury_o_futuro_da_humanidade_em.pdfIn PDF document text
    • http://nekidifuton.medianewsonline.com/english_crossword_puzzles_with_answers_for_class_7.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/hgcekEN/wofokeganipidiraxom.pdfIn PDF document text
    • https://tetagusupawuwag.weebly.com/uploads/1/3/4/5/134586179/8127239.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/L5Mhgia/82283828707.pdfIn PDF document text
    • http://zugugalepew.mypressonline.com/93978661097.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/pawolaworivakobako.pdfIn PDF document text
    • https://cdn.sqhk.co/gotuxixovumu/ijg7jdT/regepigamipeb.pdfIn PDF document text
    • https://cdn.sqhk.co/kepigofunet/cqhdjbk/prestonplayz_videos_in_minecraft.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/8262503d-c832-41e0-8b50-f36bdda4df4c/sonny_acres_haunted_hayride_hours.pdfIn PDF document text
    • http://supajiwa.myartsonline.com/can_mini_splits_heat_and_cool_at_same_time.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/jufitodonufexufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/746ff29e-ebcb-4d9f-a71e-4c427009ac80/24609282517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d676e2e-0816-4574-ad85-72a026b947e2/how_do_i_log_into_my_arris_modem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b77bb68-cc02-439a-b385-28390a630f46/thermo_king_parts_breakdown.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_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 5480 bytes
SHA-256: 62f01d1e280c6838b9c1c53e80cda25cee25465924a6da056d22202af537595e
font_01_sfnt_off000105e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E2 11468 bytes
SHA-256: f2a7df81a52a793a29729b2bbe50bb887c672196ecb59aeecf72f5e2e36aee05