Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff9d69ad8fd859c…

MALICIOUS

PDF

70.9 KB Created: 2021-02-24 20:06:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 46102fbe6d09bf1c69c7cb91ff2f370a SHA-1: 45f43bc38a124f027cca6f6b855f96a8bb26b47a SHA-256: 3ff9d69ad8fd859cdfff19a166d1142810a4350e449ee0dc0af7a89f4575ea5d
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=completing+the+square+calculator+mathway In PDF document text
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/goxuvemowuxunu-fegete-janus.pdfIn PDF document text
    • http://gutemelav.22web.org/gagepezuwuvilule.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485946/normal_5ffd1cbc77979.pdfIn PDF document text
    • http://wetebopoxegubu.iblogger.org/what_is_home_leave_allowance.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421360/normal_603598ea6510c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451348/normal_601dd936488b0.pdfIn PDF document text
    • https://fewojejano.weebly.com/uploads/1/3/4/3/134348079/tuxenajag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458150/normal_600391df54ff0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5fd689ea9f5e2.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/vesubodufisi/belosizoratijo.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/laluruxadivigagi.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/vowel_blends_worksheets.pdfIn PDF document text
    • http://visowad.epizy.com/welevupuwibuletogoraj.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_off0000d7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C2 5572 bytes
SHA-256: f761e7c89bc9bf21b0181c0b4066d168a10173f9b26ec220725763f914300280
font_01_sfnt_off0000ea9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9C 10552 bytes
SHA-256: 022a5d59ef09e1a10dc609eb746f024431ae136692627c999e4a6e4834d69b7e