Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b251e203034c9a…

MALICIOUS

PDF

75.6 KB Created: 2021-03-21 12:00:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a0db25de25a8f0c5136e01c24976decc SHA-1: 5396f48a81c769f49e524790a14f2b82d2a9d782 SHA-256: a7b251e203034c9a28e19d249e7db635f634485e1f8ae39a14a9923878e395d6
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 0.9997

Heuristics 5

  • 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 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://jottigo.ru/strik?utm_term=my+stapler+isn%2527t+working PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404488/normal_602894a0d9607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425926/normal_605192e52835d.pdfIn PDF document text
    • http://grandov.pro/dnd_5e_werewolf_lycanthropycge48.pdfIn PDF document text
    • https://cdn.sqhk.co/tegimatararo/ehhihdR/overcoming_obstacles_at_work_examples.pdfIn PDF document text
    • https://lukadivosegiga.weebly.com/uploads/1/3/4/6/134679105/gatativediju-kilijixo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470967/normal_6002cf9350653.pdfIn PDF document text
    • https://todilotifobaw.weebly.com/uploads/1/3/2/7/132712516/davepuna.pdfIn PDF document text
    • https://cdn.sqhk.co/gojinuma/0lt9rif/rozuxipadixuta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_60464559c2bb8.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/Qs9kfge/nalofodap.pdfIn PDF document text
    • https://tosulabemolajeg.weebly.com/uploads/1/3/1/8/131871730/fujilogowutug_sidolusu_sukifil_guxapobi.pdfIn PDF document text
    • http://instasale.company/xutezeoj0q7.pdfIn PDF document text
    • http://waystep.site/club_car_wash_membershiprpmbl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lebejos/sonic_all_stars_racing_transformed_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0727743-0341-4e01-bbcc-fc09de1ee5e9/what_is_a_speakeasy_in_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ba1c70-ee86-4da7-9d4d-94cfcc0ea684/2001_toyota_tacoma_stereo_wiring_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/absentee_ballot_michigan_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda59b7b-316c-4935-ba2a-bfff2c6293f2/73995089856.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/zotapekikojoliburejibu.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/the_adventures_of_huckleberry_finn_imagery.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_off0000ec01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC01 5284 bytes
SHA-256: 9f74e10ed97f91ae140fe6cca9f2c1837d9063346e0e3a88afb8ad24c9c39de5
font_01_sfnt_off0000fe3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3C 10132 bytes
SHA-256: f9e83b053bcbea7347ab8516e8b15d10aa3ed51843f89c5629b1721ec5a35ad6

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