Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ade8e95ab1df185…

MALICIOUS

PDF

89.5 KB Created: 2021-03-20 14:54:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6a9f2bd2594534dc352186555a7cdd4a SHA-1: 72433cf345e4bb1102230e3fbe46d075ca71449b SHA-256: 6ade8e95ab1df185699237c7b3ecf170b4d6921d7f223bef7bf3161aa1096690
186 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://kuzutuzo.ru/strik?utm_term=what+ink+does+hp+3050+use PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454163/normal_5ff65c1bf331a.pdfIn PDF document text
    • https://nebelifufenav.weebly.com/uploads/1/3/1/4/131437331/musavusozama_laxumib_mekonij_xigajufagoziz.pdfIn PDF document text
    • https://ridejotewofo.weebly.com/uploads/1/3/5/3/135314456/zabave.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453740/normal_6028aec2306b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479904/normal_601a6d2f624ff.pdfIn PDF document text
    • https://wusitezuredov.weebly.com/uploads/1/3/5/3/135314125/8718805.pdfIn PDF document text
    • https://mimudokax.weebly.com/uploads/1/3/4/7/134742140/toxaweluxanuturezoxo.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://uploads.strikinglycdn.com/files/a0ad08f9-c953-4b8d-9220-b5335bfe5290/how_to_find_secondary_data_in_research.pdfIn PDF document text
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_fc3d85e16040442197b975113f0ae97e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f7bbbe-a696-4845-9238-fd7d53c94ca8/sloan_flushmate_cartridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dcf06af-88d7-4683-846f-1b443e35fd66/the_crown_episode_season_1_episode_1_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56de69fb-6e2a-4d69-a8a0-112c6e66622a/dirk_gentlys_holistic_detective_agency_streaming_ita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/728564de-8633-414c-b4e3-f5274faecfba/can_you_transfer_mp3_to_iphone_without_itunes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0115d109-d020-4ab7-a965-dbfced57f0fa/gujoxirogetuluvu.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_efdddaaab59c42d1835abf6e429841cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d6b084-f7c1-4ab3-89b7-52517bccd9dd/different_types_of_lockout.pdfIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_d456576468a04b46b5ded8315ea2f4b3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/095f0365-e136-428d-9412-227c28656915/2008_jeep_wrangler_unlimited_x_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed3ab886-f10e-4ce1-9820-1eced1df163c/86363558904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2f4eb0-bb51-4686-bd59-a942400c0d59/65298457867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50418e98-1d7e-4a1a-baf1-39945da3adb3/confessions_of_a_shopaholic_full_movie_watch_online_free.pdfIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_9654a6551e074145b909e4045744a235.pdf?index=trueIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_82ba0ba0e79c48569f5aa1ce1540f9da.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C7 5308 bytes
SHA-256: 5d083b6cf46df56b90c227cc5f170ce01ba20b5c924d06c9ed939b6b3bcced42
font_01_sfnt_off00010ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD3 12024 bytes
SHA-256: ec7d942da7e3d309ebb3efca8c29bc718706d8fc9c5b32a885332a35db01089c
font_02_sfnt_off0001339b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1339B 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61
font_03_sfnt_off00014865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14865 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2