Malicious PDF — malware analysis report

Static analysis result for SHA-256 36bd92212d30083f…

MALICIOUS

PDF

70.8 KB Created: 2021-03-16 15:16:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4755a00793e6347987d9f335ac6529c8 SHA-1: 98d749e132d5d9f6f4dbbd94357e8afc447b7716 SHA-256: 36bd92212d30083f700db5a85622b92e6b0b094d76899a5402d389169729b4be
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/strik?utm_term=hp+officejet+7110+printhead+cleaning PDF link annotation
    • http://myluckybet.xyz/what_is_an_example_of_a_specific_purpose_statement2lsvn.pdfIn PDF document text
    • https://cdn.sqhk.co/nemazuwigumo/8mgighh/rising_evil_scary_granny_ghost_horror_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/jfCTjE1/siren_head_roblox_gameplay.pdfIn PDF document text
    • http://pushbiz.fun/kevamawamiloralixugarikaao58u.pdfIn PDF document text
    • https://kifosaxuwaf.weebly.com/uploads/1/3/4/0/134016965/1986291.pdfIn PDF document text
    • https://cdn.sqhk.co/detateseb/eid5m1u/boondock_saints_full_movie.pdfIn PDF document text
    • https://nivikaxixigimom.weebly.com/uploads/1/3/5/3/135322477/a66854816a.pdfIn PDF document text
    • https://pebawatiwokup.weebly.com/uploads/1/3/4/5/134576243/gakabowulob-sapesuk.pdfIn PDF document text
    • https://cdn.sqhk.co/bujugasefoli/hhiesgj/595213089.pdfIn PDF document text
    • https://vimavaduziwali.weebly.com/uploads/1/3/1/8/131856569/gizulojiwuvazakeba.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/HaQjaif/best_camera_app_for_android_free_download.pdfIn PDF document text
    • https://ponukikoruxa.weebly.com/uploads/1/3/4/3/134343798/9197734.pdfIn PDF document text
    • https://febefadu.weebly.com/uploads/1/3/1/4/131453100/wetolitakados-bujisovagu.pdfIn PDF document text
    • https://rowigoto.weebly.com/uploads/1/3/0/8/130813427/4386690.pdfIn PDF document text
    • https://cdn.sqhk.co/kelarega/akhb7jf/production_line_factory_definition.pdfIn PDF document text
    • https://viliwefat.weebly.com/uploads/1/3/1/0/131069961/65db1841052.pdfIn PDF document text
    • https://vovasodakujex.weebly.com/uploads/1/3/0/8/130874601/5140124.pdfIn PDF document text
    • https://kowadesilokawu.weebly.com/uploads/1/3/4/2/134265693/pubexi.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/LX8ngd8/maze_runner_4_trailer_espanol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_9db1c0c9a0c24a67b2b94b978d3a337a.pdf?index=trueIn PDF document text
    • https://22fea36a-5e19-4af1-b4aa-fe6e1efe0ee9.filesusr.com/ugd/b5a188_ac637d972fa841809088e6310cff4aa8.pdf?index=trueIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_b159fdb30dc14a7d95d9a70279bb3c45.pdf?index=trueIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_d2f2c1a223184ddab153f3cba34bdf9f.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD521 5548 bytes
SHA-256: 118dbc9d25be48376cbe668b569eb889a9c798f58c7734965a44d6a6e0f1fba5
font_01_sfnt_off0000e81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81B 10476 bytes
SHA-256: 982628b53120fd39d53fa0fca8d3508b172664f8a5d951d6b9bc6ecebcc09ae2