Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0ab5921d579fa7…

MALICIOUS

PDF

75.1 KB Created: 2021-03-11 23:51:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08043df8e16d325bdc4e64add5285b6f SHA-1: 705adb6378074f8834629568e4b5b2a03ba99438 SHA-256: da0ab5921d579fa72dd9c38fa5210d6526a46985ea70607cdbd7f4bcd77d87f9
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a mass external PDF link farm, with numerous URLs pointing to potentially malicious content. The primary URL, https://botokaw.ru/award?keyword=english+synonyms+for+entry+test+pdf, suggests a SEO poisoning or link farm attack pattern. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/award?keyword=english+synonyms+for+entry+test+pdf
    • https://zibizunazop.weebly.com/uploads/1/3/2/7/132710786/7409058.pdf
    • http://luxisulejoxo.getenjoyment.net/luzikuzek.pdf
    • http://somixewavado.sportsontheweb.net/deker.pdf
    • https://dezuvamugofa.weebly.com/uploads/1/3/4/1/134131805/sujexamexupugatafem.pdf
    • http://majusenise.sportsontheweb.net/how_to_make_money_cfd_trading.pdf
    • http://wikowezenitezo.medianewsonline.com/31194438161.pdf
    • http://jivusibofonefud.mygamesonline.org/complete_ground_state_electron_configuration_for_sulfur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jujageritoxo.atwebpages.com/tovux.pdf
    • http://rewuwuja.onlinewebshop.net/roliraz.pdf
    • https://uploads.strikinglycdn.com/files/42a87a56-d81d-4505-bf57-8384822dbce9/murubusilegow.pdf
    • https://uploads.strikinglycdn.com/files/3c940482-c482-4f7d-b775-9b5f2337c6c7/maritime_lawyer_florida.pdf
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_824f24b6f2fc45c6ac394e4534db611a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/932a6f22-a480-4e75-bde0-c9fbee3e1189/how_to_set_black_and_decker_coffee_maker_to_auto.pdf
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_b73a8a9b815a4e749be8c1b41bdc4549.pdf?index=true
    • https://uploads.strikinglycdn.com/files/23548683-4aaf-47bd-98c9-b446b67067b2/hol_rpg_free.pdf
    • https://uploads.strikinglycdn.com/files/1e6f72ca-e52a-4872-a20a-4b1073feb328/psych_evaluation_for_ptsd.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd3f.bin
ba9dd86ad06677ef82b9fc66565cbe1db364e5caa8fb73f24ce3e10b7ab9a08b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3F 2960 bytes
font_01_sfnt_off0000e7c2.bin
798fb69237365f7da4f4aeed3a0cb6321a221b4ccbedf6bd08cfcc56f98e39b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C2 5304 bytes
font_02_sfnt_off0000f9b6.bin
46e7a0cb8b72a33525c012b1e34eadc8ecbce94c430f0d60596dd0b27d06b2c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B6 10800 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.