Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ab7ecbe292d7a5…

MALICIOUS

PDF

77.3 KB Created: 2021-02-05 10:06:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 05606184f3509d58a5d13e0b9ad51882 SHA-1: 319cd8aa64e62ace56b4a81efbbdf1057f2eb5a7 SHA-256: 75ab7ecbe292d7a5b1d348d382411b99295ac678897f3d646f4c93a05b5e64be
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL pointing to 'bologen.ru', which is likely part of the lure to trick users into visiting a malicious site. The document body, though heavily obfuscated, suggests a search query context, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://bologen.ru/wb?keyword=br%C3%BCtten%20nete%20maa%C5%9F%20hesab%C4%B1%20form%C3%BCl%C3%BC PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417670/normal_6009338b9f487.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445733/normal_5fca2220590ed.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/S4OSjig/67657815630.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/gfXmDhe/age_of_empires_2_campaigns_chronological_order.pdfIn PDF document text
    • https://cdn.sqhk.co/givikufat/Cij1Ajg/wales_online_football_violence.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/oigjgdL/2017-_18_topps_chrome_uefa_champions_league_box.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/UBf9Qjd/nixos_home-_manager_module.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457279/normal_5fd645168b314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423442/normal_601604772fded.pdfIn PDF document text
    • https://cdn.sqhk.co/xesozugis/gAjgMhi/the_rap_board_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486344/normal_5fe0eed508b3e.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/wunojipu/vafugivuxofetumibiwonaful.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/blood_relation_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/55227967162.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/gajumejewadimuva.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/18168789623.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/nitrogeno_caracteristicas.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_off0000dcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBF 4852 bytes
SHA-256: 85570f7457f39d66158122dc06e0a80e8b95cb3aa7cfee66c3f46ade5fb462ff
font_01_sfnt_off0000ed8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8E 5596 bytes
SHA-256: 61ab7bad8cf0dc41b55307b8b7ee92f2451b8479361a626dae5f3da73583ae37
font_02_sfnt_off0000ffb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB9 12204 bytes
SHA-256: 978b3258b30c04ec5908e9bd8eae35f2e727bd116ed73fd81fde0e99f1e5c5cb

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