Malicious PDF — malware analysis report

Static analysis result for SHA-256 75be7df551e05c55…

MALICIOUS

PDF

74.2 KB Created: 2021-01-25 10:23:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 47f35a4c942893cacd0fa53ad404d4fd SHA-1: 218200a35c23e1f9fcebf25103e31a12972ba98b SHA-256: 75be7df551e05c5551d75df7b2440f1d278203df79644aa1d1c49f5c30f3f0d4
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffset.ru', which is likely a phishing or command-and-control server. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://traffset.ru/aws?utm_term=eastern+nc+saltwater+fishing+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447884/normal_5fd391196899e.pdfIn PDF document text
    • http://hydrofthol.space/45817189577q0vgv.pdfIn PDF document text
    • http://idealica-columbia.site/968804107390yv41.pdfIn PDF document text
    • http://rubyshup.space/marvelous_meaning_in_marathimjx37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420766/normal_60044d9f6d3b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387701/normal_5fcd5e99efaa7.pdfIn PDF document text
    • https://cdn.sqhk.co/purovufizu/jKjecif/craftmaster_homes_richmond_va_reviews.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481408/normal_5ffef2c65d904.pdfIn PDF document text
    • http://fringigejy.site/espn_nhl_hockey_newsc732w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/naxozelozude/raid_shadow_legends_guide_aura_skill.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/girlfriends_guide_to_divorce_episode_5.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/internet_explorer_11_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/nomowolagefaxuroz.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/43683419244.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/21943863167.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FB 5116 bytes
SHA-256: 10d41861d9d8fc8d12005a3f073def190786f33cae0ea21874cc560f7447812c
font_01_sfnt_off0000e866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE866 10984 bytes
SHA-256: be76d45cdc29a991eefdff51c28edb71d509538b2bfc70aa170af396aa30e037
font_02_sfnt_off00010de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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