Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9b8cda211def4b…

MALICIOUS

PDF

73.2 KB Created: 2021-02-27 00:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 396a01cc44c4f2fe8467c5a34561c4b7 SHA-1: 96d86d32bb27f2f6856dda897f3b37d82b33ccb4 SHA-256: 7d9b8cda211def4b3e8c5fd6c2bfd588d462a7ef3815521f4b05c12bdd251977
126 Risk Score

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-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://druttle.ru/wix?keyword=force+heroes+2+unblocked PDF link annotation
    • http://podarokinsta365.site/sefogimotorolusejogorenosd8ew2.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/fifesorumul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454967/normal_6021085acf362.pdfIn PDF document text
    • https://karaxofuko.weebly.com/uploads/1/3/5/3/135344752/gelidejotoma.pdfIn PDF document text
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/vivazolivakog_zitowoti_fadigogav.pdfIn PDF document text
    • http://mebelrostov.ru/breville_juicer_je98xlmiyrd.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/46834373328.pdfIn PDF document text
    • http://votixibutiro.medianewsonline.com/april_2020_romance_books.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427781/normal_5fe7cd44f01b9.pdfIn PDF document text
    • http://sedouche.xyz/45881153293skq61.pdfIn PDF document text
    • http://idealica-italiaofficial.site/why_the_game_changers_is_wronge63b5.pdfIn PDF document text
    • http://ufenmac.com/can_you_buy_ships_in_game_in_star_citizenm2yst.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/estandares_y_expectativas_departamento_de_educacion_de_puerto_rico.pdfIn PDF document text
    • http://monstergym.ru/rimegalelanigome5upfk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E9 5108 bytes
SHA-256: 0d247e56006d7ff4e88e6584e34be8ede049424338f4cf55799a931eb8fe76b0
font_01_sfnt_off0000f347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF347 10924 bytes
SHA-256: b7ba7aa8fe1bc434e706f85abef2d5ce9210e11f42cbb573931b0aecce90c259