Malicious PDF — malware analysis report

Static analysis result for SHA-256 6080f0d31c89d38d…

MALICIOUS

PDF

79.4 KB Created: 2021-02-18 06:07:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c0fa2df47d457dc610a6e945940f053e SHA-1: f2f15e3b9577d1f50b7533a57ab26467d3c5dee9 SHA-256: 6080f0d31c89d38d7c8381e37ac0fc8dba61f9bd49afbc164da12006ea57929f
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs point to various PDF files, likely intended to redirect users to malicious content or phishing pages. No scripts were extracted, but the presence of numerous external links indicates a high likelihood of redirecting users to malicious sites.

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://crophysi.ru/strik?utm_term=how+to+repair+a+leaky+kohler+shower+faucet PDF link annotation
    • https://pebiname.weebly.com/uploads/1/3/1/4/131453048/1218b39e13a.pdfIn PDF document text
    • https://sijezivupo.weebly.com/uploads/1/3/1/4/131408567/momamuka.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/jgibARn/52418748781.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/d5FttRW/arabic_fonts_for_instagram_copy_and_paste.pdfIn PDF document text
    • https://cdn.sqhk.co/juzivadareka/0bhRtd3/fipitepuk.pdfIn PDF document text
    • https://cdn.sqhk.co/raxulaxesob/Fjjhghn/85220154116.pdfIn PDF document text
    • https://wisamifogafize.weebly.com/uploads/1/3/4/5/134598642/zofoxodal_xujiripipomav_lerojix.pdfIn PDF document text
    • https://cdn.sqhk.co/legesizas/QhaicBV/juicy_fruit_strain_indica_or_sativa.pdfIn PDF document text
    • https://cdn.sqhk.co/wexazaruko/VHhcZWj/ruvel.pdfIn PDF document text
    • https://nutuvujupakumap.weebly.com/uploads/1/3/2/7/132740288/8005386.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/clgfvyc/2020_land_rover_defender_configurations.pdfIn PDF document text
    • https://danexuxubusam.weebly.com/uploads/1/3/2/6/132695747/52871.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/Ghfu2jj/art_education_graduate_programs_pennsylvania.pdfIn PDF document text
    • https://firunonosud.weebly.com/uploads/1/3/6/0/136052948/6628826.pdfIn PDF document text
    • https://sajofagexureleb.weebly.com/uploads/1/3/4/6/134652103/2222958.pdfIn PDF document text
    • https://xepinepuro.weebly.com/uploads/1/3/0/9/130969238/vonimafu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/busuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/descargar_whatsapp_web_para_android_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/brick_mansions_movie_480p.pdfIn PDF document text
    • http://jalovunenenema.epizy.com/zozevowalapeno.pdfIn PDF document text
    • http://fusizizugunu.epizy.com/motor_vehicle_bill_of_sale.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA2 5096 bytes
SHA-256: 52296a705c63e2a189e4af0b726bcac80729ef4c40cd484b9bc982a5868bba25
font_01_sfnt_off0000fe20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE20 10568 bytes
SHA-256: a4f78db9f560927d6426d314d5ef73a66c532b51a48db6fa943faf95c962c901
font_02_sfnt_off000121d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361