Malicious PDF — malware analysis report

Static analysis result for SHA-256 2501785ad52cf79b…

MALICIOUS

PDF

79.6 KB Created: 2021-03-08 21:51:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 107f46514d621383cb1e3b977b6e4846 SHA-1: 064466be0dab5f2a9a26833e8750bd0b14ac18c1 SHA-256: 2501785ad52cf79b2d0835035a86f03c4fdc815217276572b5a0de8a10bffa57
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of a keyword like 'barbarians royale apk' in one of the URLs indicates a lure for popular applications. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/wix?keyword=barbarians+royale+apk PDF link annotation
    • https://cdn.sqhk.co/bisozowinala/mhfByia/29757694028.pdfIn PDF document text
    • https://cdn.sqhk.co/juzosugun/ig4mR8n/mobile_phone_screen_recorder_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/ihjfDWV/contact_lenses_cost_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuvipejo/4Ojilhf/lasolokizavukajubi.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawifen/i7jejfx/eye_color_changing_photo_editor_free_online.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/can_you_cook_a_standing_rib_roast_in_a_pressure_cooker.pdfIn PDF document text
    • https://cdn.sqhk.co/xetasenuwoji/ovgiWB6/nerufomotiraxidisiwon.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/beyond_biocentrism_download.pdfIn PDF document text
    • https://cdn.sqhk.co/giruzegovu/1Sq47z6/4th_inning_conquest_map_mlb_the_show_20.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/PhhhQih/total_net_carbs_for_ketosis.pdfIn PDF document text
    • http://kipegujodup.getenjoyment.net/space_exploration_merit_badge_worksheet_answers.pdfIn PDF document text
    • http://fasoxuxesatilu.sportsontheweb.net/active_directory_basics_for_beginners.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://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_def53e0678e34334a7295818898683a4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab69431e-8a25-45d9-95fd-73d22e5debe1/tirukapowadedusemu.pdfIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_e8e63d6c245f42bf8910bf6278ddf33b.pdf?index=trueIn PDF document text
    • http://zorikeroz.onlinewebshop.net/bible_quizzes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb19a8a-d3ab-4540-a761-94fae4dd6a59/26681460383.pdfIn PDF document text
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_68ad26c54ee64ec08e889927d37efe21.pdf?index=trueIn PDF document text
    • http://rinimodosejowuf.myartsonline.com/43964379144.pdfIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_2444dcc8066548738a8ccea72dd95efd.pdf?index=trueIn 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_off0000ec8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8E 4876 bytes
SHA-256: 743df07fbf4d3d9b16e1884dfe9372792aab68f0c7d625b98e8cc79cfbf904c3
font_01_sfnt_off0000fd21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD21 11052 bytes
SHA-256: 89787f2d127ba0bd785abe88d9d75d33a835b04ef1feb291c92e3444fdfdeea8
font_02_sfnt_off000122c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361