Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d058f90f3b6fa6b…

MALICIOUS

PDF

78.4 KB Created: 2021-04-29 23:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ef511dbafbad8a151e7210b5ec8c765c SHA-1: e69654cd2e4f165da397428586e9e87414826d51 SHA-256: 3d058f90f3b6fa6b979a7d8fd70f323f7222e80f17adc3c6c1c188068d75dcc4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The primary URL, https://baarspo.ru/strik, is likely used to redirect the user to a malicious site, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://baarspo.ru/strik?utm_term=the+revenant+movie+trailer+youtube PDF link annotation
    • http://profer-opt.ru/linksys_re2000_setup_without_cd1d5z0.pdfIn PDF document text
    • http://thrivewebs.com/techno_music_xm_radioq08nu.pdfIn PDF document text
    • http://ulekschool.online/riximibubxntlt.pdfIn PDF document text
    • http://studytogether.fun/apa_manual_6th_edition_annotated_bibliography8535a.pdfIn PDF document text
    • http://taptopbot.com/65439067739vcy9p.pdfIn PDF document text
    • http://gaydating.world/wewuzadon6zgqx.pdfIn PDF document text
    • http://idealica-tufficiale.website/similar_triangles_applicationsri0y5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/wupoladuj.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/how_to_reset_a_bravos_x_washer.pdfIn PDF document text
    • http://gajovab.epizy.com/expansion_of_brackets_worksheet.pdfIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_c322575642fd4102925571ae3c894371.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf3022f5-acd1-48d4-aa27-ecd1727187ac/how_to_find_initial_speed_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/996054872.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/amelia_bedelia_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bca4fa52-a86c-4cba-9db2-17ee8d0310f4/jafuzewejowomuwevuvaturi.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/bilaxawiwuwopuwetuxawuxom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c25a89cb-8eca-422d-9ce9-f549dcdee783/41214191901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34da9ce2-8202-4f77-a919-7c78bbe1c016/how_to_descale_keurig_k40.pdfIn PDF document text
    • http://sapirabiv.rf.gd/how_do_you_measure_training_effectiveness_questionnaire.pdfIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_1b8b808df6b44eb1b6035a6528e67242.pdf?index=trueIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_b473ebddac204ec6a27037c1f0e7c22e.pdf?index=trueIn PDF document text
    • http://sosewovitifofus.epizy.com/tisapofomevuwas.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF578 5000 bytes
SHA-256: 6877382db9382c5339298073560e4896622fcef0f15e9e34089cf39f8706b3fd
font_01_sfnt_off00010659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10659 11416 bytes
SHA-256: d2da7064cbc923646f32fb4649451f5e504d6a7b9d76b664099311485bf81912

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