Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b15a7d01f45333…

MALICIOUS

PDF

77.5 KB Created: 2021-04-25 02:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 18180abd202ef23937f5f609e7c4d7c3 SHA-1: df39557274578549f04dde80fdda1c0bb47b2cc2 SHA-256: a7b15a7d01f453336bd5dcfad64ace5d055817ecef5962c7da74b76c49e1713c
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/strik?utm_term=scag+v+ride+mowers+for+sale PDF link annotation
    • http://ferabugajefelam.mypressonline.com/reading_strategies_for_the_ielts_test_download.pdfIn PDF document text
    • http://didibemez.scienceontheweb.net/cbse_class_10_english_syllabus_2020_20_download.pdfIn PDF document text
    • https://xatodibe.weebly.com/uploads/1/3/5/9/135966399/7917102.pdfIn PDF document text
    • http://bezivodediz.iblogger.org/honda_gcv160_spare_parts.pdfIn PDF document text
    • https://kojaxinepizoju.weebly.com/uploads/1/3/1/8/131856409/6e8332e645bda.pdfIn PDF document text
    • https://pisisixiva.weebly.com/uploads/1/3/1/6/131636779/vujovobiguzusanopimo.pdfIn PDF document text
    • http://fezopurabozel.iblogger.org/play_store_free_apk_file.pdfIn PDF document text
    • https://nepigisebax.weebly.com/uploads/1/3/4/4/134477897/vofasokera.pdfIn PDF document text
    • https://nofodomeki.weebly.com/uploads/1/3/1/8/131871852/9984969.pdfIn PDF document text
    • https://pudebotajiv.weebly.com/uploads/1/3/4/0/134012430/295e05.pdfIn PDF document text
    • http://danoguvokapijof.medianewsonline.com/kijusevutud.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/bidolopulerexaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/20146140448.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/ford_escape_2021_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/amphitryon_ignacio_padilla.pdfIn PDF document text
    • http://foduxidepozipiw.myartsonline.com/athlean_x_workout_free.pdfIn PDF document text
    • http://fatesixinubumot.epizy.com/global_ecological_footprint.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/agile_software_development_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/pan_card_offline_form_payment.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/myzone_wireless_tv_headphones_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/how_to_draw_a_cartoon_girl_eyes.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/game_annelids_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/11123701457.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_off0000f08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 5596 bytes
SHA-256: e733524e0866595b4923726b5613c2d05a3b7f8bf5a086bd6dd1e8e954c128ea
font_01_sfnt_off0001039a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039A 10740 bytes
SHA-256: 1265c8de19c5877ab57798ec79405f4aaa0544c6d9af7e8c25328a68f5f7a147

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