Malicious PDF — malware analysis report

Static analysis result for SHA-256 86cdfc43b25b6171…

MALICIOUS

PDF

79.6 KB Created: 2021-05-29 08:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 26aabf0fcaa201123333cb9f905135e6 SHA-1: 7cb6ba1603e12d45fe22fcaad32fbefa51750b9b SHA-256: 86cdfc43b25b617155d37fc7e19bde4bfe9c71fc993011e5c5ff3188a3a34bd6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous external links, including one to 'lozipotod.ru', suggesting it's part of a link farm designed to redirect users to potentially harmful content. The document body is heavily obfuscated, but the presence of external links and the heuristic firings strongly suggest an attempt to lead the user to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/wb?keyword=super%20mario%20sunshine%20blue%20coins%20ricco%20harbor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499653/normal_60356c7cc6a8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393514/normal_600d1664c83ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469374/normal_6027592777e27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454966/normal_6036dae9335af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452845/normal_601ca6c7d5821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473892/normal_602da13488706.pdfIn PDF document text
    • https://bupafenanibud.weebly.com/uploads/1/3/4/0/134042845/dfac3a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_601be12f5df79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421329/normal_60519367b4e3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460043/normal_6025c61e1556b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470962/normal_605eeb4398951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477629/normal_5fda8efecb5ff.pdfIn PDF document text
    • https://jebowevut.weebly.com/uploads/1/3/4/4/134493782/tufodej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484806/normal_5feb89bda9e1d.pdfIn PDF document text
    • https://nukawidizuzaxep.weebly.com/uploads/1/3/3/9/133997642/zapusekofefe_giwalamepefup.pdfIn PDF document text
    • https://pivikupawo.weebly.com/uploads/1/3/4/3/134356995/buwalodafutipa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420013/normal_5fde41c529723.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499653/normal_60048259daa5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_6023d51a16bd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478438/normal_6006372fbd166.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411944/normal_5fcb3b7200127.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3fd5aac-4edd-4c23-b281-cd7f0674dce0/84908055441.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c235ae3-a052-4492-be02-31391f8a5812/how_to_fill_bissell_proheat_2x_select_pet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d16694d-5ed7-496c-9a6e-d30063d93555/matlab_for_engineers_5th_edition_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24cb340f-dacb-4955-ade6-b331be3042a8/nfl_schedule_2015_week_7_2019.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_off0000f794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF794 5416 bytes
SHA-256: b2f07a2460b377b4c67cfee0ac1d1c63086d55b08964ea9aded527321e16d254
font_01_sfnt_off000109c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C5 10760 bytes
SHA-256: b2790d99d81f18df42de624ccff171f22e12567d0df6e4afe5b774559cb99d67

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