Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c0be1491d16783…

MALICIOUS

PDF

72.8 KB Created: 2021-02-22 00:56:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 46982895afde484a32102f66315bcfd7 SHA-1: 3593d2f3df9d7769dd0d34b9cfc6cea3706279f3 SHA-256: e2c0be1491d16783f9a5fe9c906554cbafaba9aa097fc10c3b1bb9eeaacae6c5
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 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://maypoin.ru/wix?keyword=mcgraw+hill+chemistry+chapter+9+study+guide+answers PDF link annotation
    • https://cdn.sqhk.co/fegukajebaj/ibiga7q/94349472952.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/hbaAlMw/fantasy_war_tactics_r_tier_list.pdfIn PDF document text
    • https://meripowubizaj.weebly.com/uploads/1/3/5/9/135959363/5886705.pdfIn PDF document text
    • https://cdn.sqhk.co/budotedo/dGjUyIU/chicken_gun_mod_menu_polar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465270/normal_602b03d0d0484.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwasusul/aheFhii/mafevotupese.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/ZSNQ97v/football_chairman_build_a_soccer_empire_mod_apk.pdfIn PDF document text
    • http://wigomufeze.22web.org/75176537162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377410/normal_6009b66a62f05.pdfIn PDF document text
    • https://valetapos.weebly.com/uploads/1/3/4/2/134265584/8a216.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/oMbif6q/serejadopelokimotata.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/geChbGl/rocket_royale_hack_mod_apk_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lonidur.epizy.com/36117826865.pdfIn PDF document text
    • http://duvufewitopemaw.rf.gd/raju_raj_name_ringtone.pdfIn PDF document text
    • http://mowelafawugek.epizy.com/mefobigesijejitiba.pdfIn PDF document text
    • http://zofekaxezujujom.rf.gd/relation_of_voltage_and_current_in_transformer.pdfIn PDF document text
    • http://bibirosomuxir.epizy.com/vetopokaxaro.pdfIn PDF document text
    • http://bazokupakem.epizy.com/cig_geometryczny_q0.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_off0000dda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA1 5840 bytes
SHA-256: fb8b3f07a74fb98c46dcf1d496557a7212f6220bd56778aad142ffb339db7df1
font_01_sfnt_off0000f17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17D 10744 bytes
SHA-256: d72852b28e06e141e2154fbb18495378c4a3539b35965221974a2d523574c688

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