Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de5a83f2b6918ee…

MALICIOUS

PDF

89.5 KB Created: 2021-04-23 23:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b479f9aa431a19656b05c360502657df SHA-1: 77f7cabfbd27375b33554bb63311249fa9f65b7d SHA-256: 5de5a83f2b6918ee95fbf9870b62d5e72c3ca7119a3499ee957809c2963dd31d
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely for phishing purposes. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to trick users into visiting a malicious site, potentially for credential harvesting or further malware delivery.

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://botokaw.ru/strik?utm_term=thrawn+alliances+pdf
    • https://cdn-cms.f-static.net/uploads/4470841/normal_606919bcaf4bb.pdf
    • https://cdn-cms.f-static.net/uploads/4380857/normal_606350548df9c.pdf
    • https://cdn-cms.f-static.net/uploads/4468572/normal_5fd77987c205d.pdf
    • https://static.s123-cdn-static.com/uploads/4447108/normal_5fde7c5b94adf.pdf
    • https://cdn-cms.f-static.net/uploads/4382208/normal_60114389af4f3.pdf
    • https://static.s123-cdn-static.com/uploads/4476569/normal_5ff234424c1c4.pdf
    • https://static.s123-cdn-static.com/uploads/4465131/normal_5fee4e35b2aa5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pipaneku/jubogamoxefabumipaduzatul.pdf
    • https://s3.amazonaws.com/kikunojulejuj/79925813425.pdf
    • https://s3.amazonaws.com/zatasipezeg/wuwotimimav.pdf
    • https://uploads.strikinglycdn.com/files/d71b9e37-247a-4ebe-b104-9e9105417813/how_much_do_graphic_designers_get_paid_in_australia.pdf
    • https://s3.amazonaws.com/devuxuzejozam/98403102631.pdf
    • https://s3.amazonaws.com/bogeguva/human_fetal_development_lab_answers.pdf
    • https://s3.amazonaws.com/legesiliv/casualty_theft_loss_form.pdf
    • https://s3.amazonaws.com/vekodupiwarobi/90504970305.pdf
    • https://uploads.strikinglycdn.com/files/9a3d3d19-13f6-4756-b71d-132d209c1bc1/juranofovumi.pdf
    • https://uploads.strikinglycdn.com/files/0d97fde3-4283-4bf2-ac12-05362e98bf08/2018_can_am_outlander_570_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/4a7d286e-f1de-4e74-a10f-48d00d36c301/organic_chemistry_synthesis_reactions_cheat_sheet.pdf
    • https://uploads.strikinglycdn.com/files/7ccc0e0d-0ee4-46e8-a92f-83af7a1ba775/troy_bilt_power_washer_carburetor.pdf
    • https://uploads.strikinglycdn.com/files/18cb6110-daf5-4525-b086-a35fa7ff03bd/aprendiendo_un_curso_de_milagros_leccion_153.pdf
    • https://s3.amazonaws.com/samopakamefap/define_vehicle_inspection_report.pdf
    • https://s3.amazonaws.com/rikolesafuwofar/yard_machine_snow_blower_24_parts.pdf
    • https://uploads.strikinglycdn.com/files/df0428ad-92a8-4d29-a423-423a1ae3eee2/cyberpunk_never_fade_away_mission_music.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_off00012325.bin
47286d00c1c675cf50c9d423290aa7ce4568e7132e41a116c196c4a376959d28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12325 5284 bytes
font_01_sfnt_off00013529.bin
723938030173afc00368406776b89993c4bc83470809828d9d237db58a3d1f2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13529 10488 bytes

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