Malicious PDF — malware analysis report

Static analysis result for SHA-256 83db1a3a48cc592f…

MALICIOUS

PDF

73.7 KB Created: 2021-03-13 20:55:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 386de754aabb7385bd00dfb8d6f7e3c3 SHA-1: 7eae845fbc5022d099b805f546797cc983f2a119 SHA-256: 83db1a3a48cc592fa4d3c11462efd8a7aa3ff644063c99418ac399f578c03279
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting an attempt to manipulate search results or distribute malicious content broadly. ClamAV detection and ML classification confirm the malicious nature of the file, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://xezojetit.ru/award?keyword=mariage+d+amour+piano+sheet+pdf
    • https://cdn.sqhk.co/xarozowuzosa/jdNShae/multi_stream_youtube.pdf
    • http://sis-paypal.com/barrett_jackson_2020_schedule_west_palm_beachxj4ce.pdf
    • https://cdn.sqhk.co/timafewa/3vhdCgc/racing_go_karts_for_sale_houston.pdf
    • https://cdn.sqhk.co/nefikelifu/ijajjhi/junekamumaju.pdf
    • http://sekujirimabasas.getenjoyment.net/pdf_editor_multiple_pages.pdf
    • http://feelslike35.com/the_gender_game_bella_forrest_epubkkvje.pdf
    • http://bizifemodefi.mygamesonline.org/45804823849.pdf
    • https://cdn.sqhk.co/sikudile/jejeVje/icao_annex_6_part_1_free.pdf
    • http://gisujug.mypressonline.com/simple_python_project_template_github.pdf
    • https://cdn.sqhk.co/satukevaguka/ggeO9Ol/lufemiwavovabakuko.pdf
    • https://cdn.sqhk.co/sevijeruba/BZFhcje/troll_adventure_mod_android_1.pdf
    • http://creamwalls.space/watakexisemisuxakibu5frgs.pdf
    • http://pycnidwzxc.info/653072246259l0w9.pdf
    • http://trokot-shtorki.online/42026279714sy5kz.pdf
    • https://cdn.sqhk.co/kajutizikodu/fwijZgf/tuxev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_61bfcf5be22a40fbb679804193eb6374.pdf?index=true
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_a56ccd6990ab4233b6890d3cfbf5b7f9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c9c3e692-2240-40f3-8b54-dd1266af9a2b/wavubuxatobuligazasiwuda.pdf
    • https://uploads.strikinglycdn.com/files/6d276812-ac40-4987-af66-c3e1d3319044/95652369973.pdf
    • https://uploads.strikinglycdn.com/files/4ecf40d3-bcd0-43c5-8bf7-4ba3c030d21b/metal_gear_solid_4_ps4_gameplay.pdf
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_26a7a7d298504b6cb103d1339520e96e.pdf?index=true
    • http://zejibanunepi.myartsonline.com/star_trek_picard_story_leaked.pdf
    • http://pogetowem.onlinewebshop.net/jajer.pdf
    • https://uploads.strikinglycdn.com/files/2a98baef-2a13-40b5-8be9-023a113cf5eb/que_es_mecanico_industrial.pdf
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_12b099fc3c884382904d401773225efa.pdf?index=true
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_52156d84be14446f970cb0af6b87c159.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3538b16d-6539-4a8d-87a3-4918004296bf/agile_estimating_and_planning.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_off0000e189.bin
e55e16d98d066178821b4ae1ed8512e5c24558bf457dbc2ecf47292f6b532db6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE189 5428 bytes
font_01_sfnt_off0000f3e1.bin
239275837609b37daf4c0a5ea48c33802a22edd9bcaf535ea09a887bed0478a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E1 11148 bytes

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