Malicious PDF — malware analysis report

Static analysis result for SHA-256 357221cacba18bc7…

MALICIOUS

PDF

81.0 KB Created: 2021-03-12 08:03:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0632b06501e091b1ef656c7524d3a86d SHA-1: 8e196a1e0c48946ddced531ba6763fcfafa9790f SHA-256: 357221cacba18bc776dc4db823f63a24cbb8b8392a8367ab717176d2b5694ace
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple embedded URLs, with a primary focus on `https://dugedepap.ru/wix?keyword=takefile+premium+key`. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document's structure and embedded links suggest it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • 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 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://dugedepap.ru/wix?keyword=takefile+premium+key PDF link annotation
    • http://vizilirudigub.getenjoyment.net/sikefivujal.pdfIn PDF document text
    • http://pemotutafid.mywebcommunity.org/information_technology_jobs_nz.pdfIn PDF document text
    • http://sebevifa.getenjoyment.net/83254003578.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/42860459625.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/ieihAzJ/pibugetaxazixitisokog.pdfIn PDF document text
    • http://jiteruruw.sportsontheweb.net/how_can_hr_improve_employee_productivity.pdfIn PDF document text
    • http://nugekurobeju.iblogger.org/wave_jobim_piano_sheet_music.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/vibexigasezesopopidog.pdfIn PDF document text
    • https://cdn.sqhk.co/xekixuzurim/hfn93F2/70039857313.pdfIn PDF document text
    • https://cdn.sqhk.co/dagufiwus/je5hhih/lumino_city_coupon_code.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/kiss_the_rain_easy_piano_sheet_free.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/5aibVge/.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/how_to_clean_a_scunci_steamer.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
    • http://wafowudu.epizy.com/lofagaraguvowuxidopegax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7062a18-584b-4d49-b0aa-1a8c64086f4b/gefase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d916d079-2ce6-4693-be3d-acc5c3c06d38/how_to_simplify_exponents_algebra_2.pdfIn PDF document text
    • http://xogeguf.rf.gd/additional_mathematics_for_west_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c39ed89-f870-4d64-83a3-312afae37790/14267350244.pdfIn PDF document text
    • http://wobanunep.myartsonline.com/nazopesivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dc2b247-2467-47dc-ba42-615e18556f01/vishnu_sahasranamam_lyrics_telugu_ms_subbulakshmi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05f933aa-4aa6-4480-9d23-fb532d7e5db5/24917571640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7844cd65-e97c-46b1-a0d7-e135935c322c/harbor_breeze_merrimack_ceiling_fan_light_bulb_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ade8279-7aa5-4b10-a2b2-09e13d619047/english_speaking_lessons_for_intermediate_level.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85f33a16-a6cc-4513-9324-0dfdcefba19f/serato_dj_pro_macbook_air.pdfIn PDF document text
    • http://pomuvoxibi.epizy.com/cooperative_group_role_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2467090-e6f2-4ec3-b398-f3a54169f38f/the_ugly_american_book_vs_movie.pdfIn 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_off0000f193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF193 4572 bytes
SHA-256: 7ffa1f84ca4a40f1e507bbe12994dfa826b85ce2908a9d03ab076476227d8d0d
font_01_sfnt_off00010119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10119 11916 bytes
SHA-256: bd4ade060aae976a37dff0b921ba4a7bcdea1a0e864f2721bedf4ecb6321f685
font_02_sfnt_off00012853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12853 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2