Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf26bd1c22010ebe…

MALICIOUS

PDF

72.1 KB Created: 2021-01-01 07:34:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1729e79d7d85fa9099358213843db900 SHA-1: 3fc6ea2106e022431675ac36660cf29abd6662bd SHA-256: bf26bd1c22010ebee303aae72f444e2be6b3101df076d11cfc0190e99bb951a6
214 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 link to a known malicious redirector infrastructure, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'aesthetic lockscreen anime wallpaper iphone x' and the wkhtmltopdf application, likely a lure to entice clicks on the malicious URL. The presence of numerous embedded links, including one pointing to a PDF file on S3, indicates a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=aesthetic+lockscreen+anime+wallpaper+iphone+x In PDF document text
    • https://cdn.sqhk.co/xezojutatow/jiXnjin/20390633477.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/i9thaVk/talk_with_other_parents.pdfIn PDF document text
    • https://vasedowazapen.weebly.com/uploads/1/3/4/3/134320052/8200300.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/djjfMbG/the_last_remnant_remastered_gamespot_review.pdfIn PDF document text
    • https://cdn.sqhk.co/mapexuze/RvX4igd/reborn_dolls_shop_coupon_code.pdfIn PDF document text
    • https://wexemexaxixu.weebly.com/uploads/1/3/4/7/134709907/daneto-vejobero-lelijatuwulaga.pdfIn PDF document text
    • https://rezukozivir.weebly.com/uploads/1/3/4/6/134631959/7552292.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/wazorixekunafob/vidurasebali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7bf86b9-f11c-4d70-9e67-70a310a0930a/whatsapp_apk_file_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03b1e4ba-d3b0-4e3c-ad43-eb1e3f0baaa0/fundamentos_de_programacion_unadm.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/cerebral_palsy_in_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/halo_3_pc_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f692cd9-3c20-4c96-ab8a-a860f3de894f/tudavafadositupizabituxik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64491f2c-4aab-4ffa-b79f-1363f5c4a516/table_tennis_shoes_butterfly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27ec19c6-3256-48dc-b3b7-d94cb9a2befa/2_inch_3_way_pool_diverter_valve.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/minecraft_story_mode_full_game_apk_download.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_off0000de37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE37 5384 bytes
SHA-256: 2683e667acce914b39e9c3a7b215f846f1cf9b4bf41c9149946eae985454db0e
font_01_sfnt_off0000f073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF073 10168 bytes
SHA-256: c6e881cb2164b5b3fa3a576d385eeeb0e06baf0dd1ff5491b6b17bac76a2f080

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