Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c036f6e93ae7ba…

MALICIOUS

PDF

72.1 KB Created: 2021-03-23 22:36:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bd959526e00a6907aa54a80b5ee3f565 SHA-1: 203146fdc76d0fedbd9874aecc3edbb87b8dc684 SHA-256: d1c036f6e93ae7ba217041ecfbce6fc07ada26fab97385670501430f5d379563
156 Risk Score

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 0.9993

Heuristics 5

  • 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.
  • 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://pelibifir.ru/strik?utm_term=armor+of+god+tattoo+forearm PDF link annotation
    • https://noxurawikatiner.weebly.com/uploads/1/3/1/1/131163986/kudapepubogukaxewu.pdfIn PDF document text
    • https://tetunabirudav.weebly.com/uploads/1/3/0/8/130874278/977838.pdfIn PDF document text
    • https://pudogujapoveg.weebly.com/uploads/1/3/6/0/136090910/serurerufegizer_bexafimipila_katig_nudejezezexete.pdfIn PDF document text
    • https://muwalivom.weebly.com/uploads/1/3/2/6/132695892/cda5296acf91c.pdfIn PDF document text
    • http://toteganutiv.66ghz.com/best_minecraft_survival_servers_1.8.8.pdfIn PDF document text
    • https://nulixosur.weebly.com/uploads/1/3/4/3/134311840/d8f6c33745518.pdfIn PDF document text
    • https://tenemetit.weebly.com/uploads/1/3/2/6/132696414/muguwutinox.pdfIn PDF document text
    • https://kurupatasewa.weebly.com/uploads/1/3/5/9/135958836/813a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nadadeze.epizy.com/manuale_bticino_x8000.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/bearing_types_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/42_jackie_robinson_movie_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/lamowegananaf.pdfIn PDF document text
    • http://lodufuvu.epizy.com/civilization_5_best_strategy_guide.pdfIn PDF document text
    • http://kewivifonawati.epizy.com/25093158730.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/bhakti_song_dj_bihar.pdfIn PDF document text
    • http://jutivowewinuled.epizy.com/age_discrimination_act_2020.pdfIn PDF document text
    • http://talagolow.rf.gd/93892367413.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/9329664619.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/12573672101.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/gikazeleluw.pdfIn PDF document text
    • http://daxepusiz.rf.gd/double_bubble_map_template_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/hedging_options_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/93038597074.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_off0000deb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB9 5008 bytes
SHA-256: c31820fed12db77fbb8ad7eb424cf659a4fce203a379fdd340d86835e4052157
font_01_sfnt_off0000efaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAF 10400 bytes
SHA-256: 48781e0d568b4ee4173b936cdaf551b6b016e99594b38d417c067d69d2131b70

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