Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e43d2253020cd55…

MALICIOUS

PDF

91.4 KB Created: 2021-02-20 12:57:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7d432400d3938df49eb3f3941e7edc58 SHA-1: d44f516f443bc08a94b4ef4d042b96feeef37a45 SHA-256: 9e43d2253020cd551b808647dabb84d4b50d9f416d39bddd613cfd63f4196081
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=2008+jeep+wrangler+for+sale+bc PDF link annotation
    • http://nemogaguwexero.iblogger.org/39537267048.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/fcibkgc/865289624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501965/normal_600b360067187.pdfIn PDF document text
    • https://dixufewopirar.weebly.com/uploads/1/3/0/7/130775961/dolimedinejirilanebi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380522/normal_5fdddc79373ad.pdfIn PDF document text
    • https://cdn.sqhk.co/zizaratijiga/gjRjejj/whatsapp_auto_reply_message_sample_for_friends.pdfIn PDF document text
    • https://cdn.sqhk.co/kovajivika/gjjcibb/1270284571.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459329/normal_5ffb91e0f04af.pdfIn PDF document text
    • https://cdn.sqhk.co/bulegumu/KifgQAZ/tewoteme.pdfIn PDF document text
    • https://pobufulali.weebly.com/uploads/1/3/4/4/134494274/xiseresamo-duxakedu.pdfIn PDF document text
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/mimavozakivul.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuwutitaw/hIJjfhj/zamowutajenotoruli.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/jjhji2s/just_drive_simulator_gameplay.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/ratixifo/84399348608.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/spreadsheet_packages_definition.pdfIn PDF document text
    • http://xixupokolaxusuv.epizy.com/sears_model_200_20_gauge_shotgun_value.pdfIn PDF document text
    • http://vegexiwijije.rf.gd/petsafe_wireless_fence_extra_receiver_collar.pdfIn PDF document text
    • http://duxawunofuror.epizy.com/dell_latitude_e5400_bios.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/domep.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_off000117bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BC 5524 bytes
SHA-256: 4e1c598a3cdc550af851bf3801c4f62e478e118c9ea792c25a8488a076ef7fde
font_01_sfnt_off00012a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A93 11716 bytes
SHA-256: c10be2ca9ce5d3dd835f509e6c995b29ff2869385417f6c0c0d9dc325a79251a
font_02_sfnt_off00015290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15290 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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