Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c8cff2978a533bf…

MALICIOUS

PDF

72.5 KB Created: 2021-02-11 19:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c02cdca9ca9bba37d48c4ec5c67c7a7a SHA-1: 975b7fe5bf60db480b0c4edcf2384a55fdafd89e SHA-256: 3c8cff2978a533bf52872f2dcfce95d81b9ce93ce426010048956f1e54738f9b
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=horton+brotherhood+crossbow+manual PDF link annotation
    • http://tutavizukatafoz.22web.org/automatically_detect_internet_connection_in_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487200/normal_601f20fb599fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459323/normal_5ff5dac5ac25d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420756/normal_60111bc9a9202.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495271/normal_600345b259271.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420031/normal_5feb3fb367a81.pdfIn PDF document text
    • http://bobejitamatu.iblogger.org/29855993144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423188/normal_5fdbf5e13836c.pdfIn PDF document text
    • http://nefuwumimo.iblogger.org/asean_variation_guideline_for_pharmaceutical_products.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pamerugug.epizy.com/play_store_beta_apk_mirror.pdfIn PDF document text
    • http://baperosuvo.rf.gd/78420616559.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/ashes_cricket_2009_game.pdfIn PDF document text
    • http://kigajorujotek.rf.gd/20068861189.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/torurip.pdfIn PDF document text
    • http://wijudog.epizy.com/34778549106.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_off0000dc25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC25 5372 bytes
SHA-256: 2f3cc2bd5e7f8ae38f007ae7c98a59351f752fc8464a1484ce306d0655e8162d
font_01_sfnt_off0000ee44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE44 11296 bytes
SHA-256: 4ad3c4777502e4fcadc2d7d0a8318a8431938605c3f59c238255f0090cbb1783