Malicious PDF — malware analysis report

Static analysis result for SHA-256 856aa45ff974cf97…

MALICIOUS

PDF

93.3 KB Created: 2021-03-17 15:25:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2ca5c4f92c0e4e4ea66896a3b81ba4d SHA-1: 2ad8ee690587c0085d86c95a07e94bc41aea7fd4 SHA-256: 856aa45ff974cf97629e48deb5a6d8e4fc3a05e4c471abc6fcff69d1e86fdce0
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL that masquerades as an anti-bullying policy template, likely intended to trick the user into visiting a malicious site. No scripts were extracted, but the PDF structure and embedded URI indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://jumiwimov.ru/123?utm_term=anti+bullying+and+harassment+policy+template
    • http://bagomebefekixob.getenjoyment.net/gelesafepegemori.pdf
    • http://rafewasugajeze.22web.org/cacani_animation_crack.pdf
    • http://folugomobok.getenjoyment.net/baixar_ios.pdf
    • http://difipalilif.scienceontheweb.net/how_to_replace_stylus_on_turntable.pdf
    • http://tezoxefakalexo.sportsontheweb.net/steven_pinker_enlightenment_now_summary.pdf
    • http://dirozigumifew.scienceontheweb.net/oxford_phonics_world_3_workbook.pdf
    • http://xukosususif.medianewsonline.com/chicken_biryani_recipe_bengali.pdf
    • http://vuwiwetidajin.mywebcommunity.org/44713969872.pdf
    • http://jigapenufi.medianewsonline.com/71827758643.pdf
    • http://sesesuruko.mypressonline.com/sample_behavioral_interview_questions_and_answers.pdf
    • http://talajifit.mywebcommunity.org/polynuclear_aromatic_compounds.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://vajavilodufolix.epizy.com/fuzoratisiwos.pdf
    • https://uploads.strikinglycdn.com/files/e1c812c2-004b-4c63-8491-3f11a30a5c4d/makafukezonota.pdf
    • http://puwaviferu.rf.gd/church_annual_report_template_word.pdf
    • https://uploads.strikinglycdn.com/files/0ec4514d-6f2f-4aa8-be70-0396a0e4496a/55767629777.pdf
    • https://uploads.strikinglycdn.com/files/b8c0f36b-d4b0-4830-9585-1eee6970b181/japanese_phrasebook_war_department_1944.pdf
    • https://uploads.strikinglycdn.com/files/4b0ca3fd-ba3d-47b7-800e-215cc63402d1/11738215808.pdf
    • http://mojogoralil.onlinewebshop.net/g_shock_rangeman_gpr_b1000_strap.pdf
    • http://dipimov.epizy.com/88467814551.pdf
    • http://fuvituze.epizy.com/xomorelu.pdf
    • http://tepuxasimu.rf.gd/95522643087.pdf
    • http://deweperiji.epizy.com/canterbury_tales_analysis.pdf
    • http://fowimifefezujo.myartsonline.com/bobekeba.pdf
    • http://buwozefavimim.epizy.com/zabuge.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b7a.bin
6f715bf4376603d7b1a2b292fcfe41c39030ab65ea346e8e07bdc4824a642088		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7A 5600 bytes
font_01_sfnt_off00011e48.bin
e3be8fcf41d21177dc5a497994e4fce6317dbccb74eba562c421d77ef05b24a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E48 10876 bytes
font_02_sfnt_off0001438e.bin
1e06bb10e161b5b6fe4eec47f9b520e4bf8895e9b4801c104d6f3e1f8df2c38b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1438E 16292 bytes
font_03_sfnt_off000158d3.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158D3 4324 bytes

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