Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2410e4cc7ae821f…

MALICIOUS

PDF

85.8 KB Created: 2020-12-18 13:50:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c143cac461b937f991cbaac52e524b36 SHA-1: 53b990679a28f720417e8182f78447f2e200ab85 SHA-256: c2410e4cc7ae821ff2ecb5b2f3288b572fe40724c03a08b62d9c108b4382f411
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pointing to a large number of PDFs. The embedded URL 'https://traffnew.ru/aws?utm_term=veterinary+anesthesia+and+analgesia+author+guidelines' suggests a lure related to veterinary guidelines. ClamAV and an ML classifier also flagged this PDF as malicious, indicating a phishing or spamming intent.

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
  • 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://traffnew.ru/aws?utm_term=veterinary+anesthesia+and+analgesia+author+guidelines PDF link annotation
    • https://zeziruxowajud.weebly.com/uploads/1/3/4/6/134698921/24458f.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/lulelepese/61810823104.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78bb4161f8068becf173c/t/5fd6fc4bdca221526057b7f9/1607924812550/xovuwizafadajagakepajomax.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/bootstrap_confirm_modal_template.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/crayola_color_alive_app.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/81391439644.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/shuffle_people_roulette.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/brother_printer_scanner_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/delhi_belly_movie_hd_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/bixasepejukeritekaxib.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/skyrim_thieves_guild_quests_walkthrough.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5587827a199023ad2f44a/t/5fcd08e9662d5e24e0a65cef/1607272682623/geometry_dash_world_1._8_scratch.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_off00011064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11064 5156 bytes
SHA-256: a6ae4275c8f8cf3ba71912aedc0967e72d63d66d0f55488f3dca098422b61e4c
font_01_sfnt_off000121eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EB 11800 bytes
SHA-256: a58f108d92e5525937a6795fb7e40ff08f581ddd46373630138cd43a8aba7652

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