Malicious PDF — malware analysis report

Static analysis result for SHA-256 d92a7ec73e430b30…

MALICIOUS

PDF

80.8 KB Created: 2021-04-06 04:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c91f7451fb3090739b20c7b3f1045bf3 SHA-1: 68f3de16e067c1cf38b15a5a5a6b8d8cdc147ff1 SHA-256: d92a7ec73e430b3035c5d6657865fbdb4fb383bb2f9887bea6bc314b5d9c33b3
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm designed to direct users to various websites. The presence of the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' and the ML classifier output strongly indicate malicious intent. The document body, though heavily corrupted, contains references to 'Ferrari 488 gtb price 2016', suggesting a lure to attract clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/strik?utm_term=ferrari+488+gtb+price+2016 PDF link annotation
    • https://kuritemu.weebly.com/uploads/1/3/1/3/131383398/zudurexaraj.pdfIn PDF document text
    • http://proita.fun/7928802854187b12.pdfIn PDF document text
    • https://cdn.sqhk.co/monubinejon/FjdJjcU/36051016737.pdfIn PDF document text
    • https://nopetozu.weebly.com/uploads/1/3/4/5/134507327/reketaso.pdfIn PDF document text
    • http://milanomoda-italy.website/old_baseball_pinball_machines_for_saleiy13s.pdfIn PDF document text
    • http://tidirakozodawon.getenjoyment.net/the_cask_of_amontillado_full_story.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/ijbwhbF/lesson_plan_teaching_learning_process.pdfIn PDF document text
    • https://tedetoxemerul.weebly.com/uploads/1/3/5/3/135311624/af3af103c253.pdfIn PDF document text
    • https://savaxibinis.weebly.com/uploads/1/3/3/9/133997587/8e75867b71c3.pdfIn PDF document text
    • http://blubadgehelp.net/encyclopedic_dictionary_of_pipeline_integritytwnpu.pdfIn PDF document text
    • http://bilkan.fun/philips_tv_manualspi5jp.pdfIn PDF document text
    • http://usesol.xyz/34667947479xgnea.pdfIn PDF document text
    • http://redofokotab.sportsontheweb.net/cerro_bayo_atahualpa_yupanqui.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/198525868.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/jjiijgR/xudajezofadixazedunotide.pdfIn PDF document text
    • https://raguwagoneneza.weebly.com/uploads/1/3/1/3/131384547/8552867.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/0ehi5gd/21945012095.pdfIn PDF document text
    • https://cdn.sqhk.co/fojupigek/MspjiB8/grendel_farming_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/zotiperugi/Bgigiej/98892003935.pdfIn PDF document text
    • https://cdn.sqhk.co/korokotuduki/gddific/battle_of_warships_naval_blitz_hack_mod_apk.pdfIn PDF document text
    • http://geparup.scienceontheweb.net/continuous_martingales_and_brownian_motion.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/64de3d39-cdab-4ff8-9c3f-989f8d76d013/remodad.pdfIn PDF document text
    • http://dajomilot.atwebpages.com/kefitazusam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef45fc4a-0f0e-46e9-8784-057a2bf96419/41427300349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f20abbfd-4e27-4b15-9934-355f44717535/registered_mail_tracking_usps.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_off0000fb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 5748 bytes
SHA-256: 8663365151df458d5a9f22f6ae9cb6d46fd8e38463a9d53a1a32aba40de677bc
font_01_sfnt_off00010ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC2 11624 bytes
SHA-256: e4d3c9bf34bd37703224970a1d0ffc12cfe85a8e39ca2db43f2c64cf773a6d73