Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6031965ca52339…

MALICIOUS

PDF

74.7 KB Created: 2021-03-17 01:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dac59b6344d1cbcb1ab7cd25191950d1 SHA-1: 9d540ddffc2999803c0e96f20b747ea7474cdbc9 SHA-256: 0e6031965ca52339adbdafd2e2e2c4b3a6b821fde8a9ec3f87211b83142e4280
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection for phishing and trojan activity. The primary malicious URL, 'https://druttle.ru/wix?keyword=aviation+standard+operating+procedures+manual', suggests a phishing attempt disguised as a technical document. While no scripts were explicitly extracted, the PDF structure and embedded links indicate an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wix?keyword=aviation+standard+operating+procedures+manual
    • https://cdn-cms.f-static.net/uploads/4378161/normal_5fd92ab938e60.pdf
    • http://fishland.store/badinerie_flutegq3lh.pdf
    • https://cdn-cms.f-static.net/uploads/4401716/normal_6041c049ccade.pdf
    • https://cdn.sqhk.co/pusuvizodez/Dicgiig/76463737827.pdf
    • http://moymagazin.xyz/rotutov23cqr.pdf
    • http://ihsteam.ru/594790501916pxc4.pdf
    • http://wownatural.fun/60870297848epwz5.pdf
    • https://static.s123-cdn-static.com/uploads/4477163/normal_5ff4263b0c234.pdf
    • https://cdn.sqhk.co/jumifokujuje/hrjadaR/birdies_golf_shirts.pdf
    • https://cdn.sqhk.co/kisasizaro/JhfxgdL/flik_flak_football.pdf
    • https://cdn.sqhk.co/newuvuze/haNW7rs/dokkan_battle_lr_frieza_guide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_212cd0a0cdfd460b895a77ca2f2a12a4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b5fad50d-e10e-47eb-820c-559884b2d5ec/maths_worksheets_for_grade_6_with_answers.pdf
    • https://s3.amazonaws.com/wusigipufuvowix/rofuxiwezerisujoke.pdf
    • https://s3.amazonaws.com/kodipopujufipig/finapebe.pdf
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_cde881f665ec4ea78a547c7254e678d6.pdf?index=true
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_8dc332a8a7c14819ae923ac726298924.pdf?index=true
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_ae041dfccad54b5295b4e6f83341687c.pdf?index=true
    • https://s3.amazonaws.com/tomamujuf/python_base64_decode.pdf
    • https://uploads.strikinglycdn.com/files/9b7a7904-282f-496c-b0ac-246553e67bb4/80858082324.pdf
    • https://uploads.strikinglycdn.com/files/68433236-b4fc-4e8d-969a-2745142253e0/what_animals_eat_fleas.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e527.bin
06e5fddaab2ec6bfcdc341ca2aad106a7ebbc6b7afe1586c077e8328fcaf852d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE527 5444 bytes
font_01_sfnt_off0000f79e.bin
830ee08d78a29bab157aa748b8f3d0fb9b79936418db852aae7e801485fb06c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF79E 10740 bytes

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