Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3bb488a493b10d…

MALICIOUS

PDF

76.1 KB Created: 2021-04-04 09:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b392eda04689e9779504326a4bd09bcb SHA-1: 144fe37357f035dc90495d41d0d9ea2d0aa5858f SHA-256: ae3bb488a493b10d3cfd2ee9ab381a2735b3f05712a62b8fc5cf5f3f8bbd9e85
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://golowaki.ru/wix?keyword=4th+down+and+9. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • 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/wix?keyword=4th+down+and+9
    • http://pusikoxelumide.iblogger.org/amway_atmosphere_drive.pdf
    • https://vebuxevofarina.weebly.com/uploads/1/3/4/0/134013543/botazalareb.pdf
    • http://faripofijukevom.mywebcommunity.org/brutal_dog_fights_caught_on_tape.pdf
    • http://mihetos.xyz/sodulukakogetebodv0tp1.pdf
    • http://itali-big.space/mr_love_queen_s_choice_walkthrough_gavins9cat.pdf
    • https://ferugagesavisux.weebly.com/uploads/1/3/4/6/134687542/zomaviwazugiburisaz.pdf
    • https://gikuxowatevu.weebly.com/uploads/1/3/2/6/132681634/davutebulodutowib.pdf
    • https://turakenedonatup.weebly.com/uploads/1/3/4/6/134610331/nujarazowif-varofeveriwuni-pejurolizegel.pdf
    • http://3gusevshop.space/star_wars_battlefront_2_trke_yamat5izd.pdf
    • http://epipog.com/83006730179qmwc9.pdf
    • http://foropemewefuwif.22web.org/basic_linux_commands_list.pdf
    • https://felanixumuxovex.weebly.com/uploads/1/3/4/7/134705369/4735466c.pdf
    • http://keepmaxi.space/word_attack_two_player_gamescnko3.pdf
    • http://kegetisa.mygamesonline.org/the_algorithm_design_manual_steven_skiena.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a9d1d3ec-13fa-4b7e-abe1-abe2c2ba1301.filesusr.com/ugd/f83029_e7675ac36bd542d1bcb41ccd621c8413.pdf?index=true
    • http://wawaxujogoned.rf.gd/best_camera_editing_apps_for_android.pdf
    • https://d33b8dfc-9792-4d26-9d81-613d0bd32a71.filesusr.com/ugd/d34367_56bc86575b1d403190843f5f8cfdb145.pdf?index=true
    • https://de26864d-dd79-4a6d-8467-b5cf435a6969.filesusr.com/ugd/6ff07c_60185a1df4754f998f8495cf8e610579.pdf?index=true
    • http://pexulimawuz.epizy.com/67608749308.pdf
    • http://rivoteb.rf.gd/how_to_remove_first_alert_smoke_alarm_battery.pdf
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_72da4609b47e46648f0e38b335dcbbb8.pdf?index=true
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_a0355546b2664d49b7b0d30df6ce5952.pdf?index=true
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_99ff21fc11394a428bcab344efa08758.pdf?index=true
    • https://ce722411-b424-48ee-ac00-b4ed8818edd9.filesusr.com/ugd/bff0de_8e0ed4222b38405c92c4fee3b6802b72.pdf?index=true
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_a0a8e27092a8405fa36dba9c6240c682.pdf?index=true
    • 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_off0000ea0a.bin
66e5df000058cb06352415b27701176b7599168ffadd9cdafa1afc1717defd7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0A 4848 bytes
font_01_sfnt_off0000fa9d.bin
acc8fd598c9f7dd596b75c5040af6374b6907a4c9997e6fed0b0a310895bf881		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9D 12016 bytes

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