Malicious PDF — malware analysis report

Static analysis result for SHA-256 3424b14295b31cf1…

MALICIOUS

PDF

80.8 KB Created: 2021-03-19 10:33:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a94e7f68a1bb2503e355be82322546a6 SHA-1: 6ccbc652e4a11ade59a3aaddea56fa41cbb2fc16 SHA-256: 3424b14295b31cf1577fe12068a3ef8ed31534370036c38180318d24d8815feb
96 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL and numerous other URLs point to phishing or malware distribution sites, suggesting the document is a lure for further compromise. Although no scripts were explicitly extracted, the PDF format and the nature of the URLs suggest potential for JavaScript exploitation or a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/award?keyword=zoho+aptitude+questions+2020+pdf+download
    • https://wugepugozufov.weebly.com/uploads/1/3/4/7/134744675/538d8508b.pdf
    • https://febasenijig.weebly.com/uploads/1/3/1/3/131379808/rikotorazogol.pdf
    • https://kevonixoxudunu.weebly.com/uploads/1/3/0/7/130775897/wasurilemo-kevagerareweg.pdf
    • http://lobabinuladeri.medianewsonline.com/princeton_review_mcat_physics_reddit.pdf
    • https://punulizi.weebly.com/uploads/1/3/5/9/135957491/lemalevusig.pdf
    • https://zilexewutefak.weebly.com/uploads/1/3/4/6/134608169/2430174.pdf
    • https://static.s123-cdn-static.com/uploads/4490752/normal_5ff9a64b1306a.pdf
    • http://nositadox.mypressonline.com/65166034150.pdf
    • https://cdn-cms.f-static.net/uploads/4461509/normal_604d763f102e6.pdf
    • http://wobokepukano.iblogger.org/does_citizen_eco_drive_watch_use_a_battery.pdf
    • http://tufofol.medianewsonline.com/bizatokuwit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/07992bc6-99b7-45ac-a022-44ca4096df97/tibetan_book_of_the_dead_summary.pdf
    • http://gezixus.myartsonline.com/vojexexafexolulametu.pdf
    • https://uploads.strikinglycdn.com/files/cb8f7e49-13d9-4198-b762-96291654fed7/how_to_start_with_calculus.pdf
    • http://jenikov.epizy.com/93917025857.pdf
    • http://rofuvawitarul.atwebpages.com/vejopajekinuteko.pdf
    • https://uploads.strikinglycdn.com/files/b511ecf9-46b5-441d-845a-0767c0f347f5/kitchenaid_electric_cooktop_installation_instructions.pdf
    • http://davixajo.rf.gd/tecumseh_10_hp_engine_repair_manual.pdf
    • http://kilarosine.atwebpages.com/green_supply_chain_management_definition.pdf
    • http://pevipitoz.atwebpages.com/30308507241.pdf
    • https://uploads.strikinglycdn.com/files/ac3c12be-865a-4522-9a16-210dde675f6f/the_lion_the_witch_and_the_wardrobe_characters_images.pdf
    • https://uploads.strikinglycdn.com/files/2796ec8e-0bbc-4276-af38-b20e9cebb581/rockwell_1756-en2tr_user_manual.pdf
    • http://tifilow.onlinewebshop.net/60903746008.pdf
    • http://ketavulamuxi.epizy.com/evan_moor_daily_phonics_grade_2.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_off0000fd3d.bin
538953a6d472ed2d0f2db457df73d44e451429a4379aeeac96d85c972b02a043		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3D 5480 bytes
font_01_sfnt_off00010ff9.bin
b1b9d9e68031e94f609afec9a10d261cc6e78accbb0183caaee97838788743d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF9 11012 bytes

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