Malicious PDF — malware analysis report

Static analysis result for SHA-256 45fb17ca4d178be1…

MALICIOUS

PDF

72.4 KB Created: 2021-02-25 17:32:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: df8c13d2392b596c939e0ae3e7259a4c SHA-1: f04f4e3c143c15f75428b4938d7e1d0a6f23f206 SHA-256: 45fb17ca4d178be13802a4dc3ef07bea535dbb3511927ab77f93886d039fbec2
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://crophysi.ru/award?keyword=what+are+the+fuel+system+main+components In PDF document text
    • https://cdn.sqhk.co/tinodifozeza/3Vhckhh/15875788088.pdfIn PDF document text
    • https://siduwibe.weebly.com/uploads/1/3/4/7/134775996/70f2676d4647b.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/xurovanezuzulegawuzug.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/pojinada.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/bevekodawawu.pdfIn PDF document text
    • https://porujigiwafixuf.weebly.com/uploads/1/3/4/3/134373975/7c53b904103.pdfIn PDF document text
    • https://vidiguwases.weebly.com/uploads/1/3/4/3/134347373/porovebulesufipa.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/bejenosugede/dapple_dachshund_for_sale_near_me.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/18795229627.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/bright_young_things_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/ranapopoxip.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_off0000e0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D2 5372 bytes
SHA-256: 5acbc8d6d68b5e0847813fb33e8bea69e8ad841b6221e874e84a6b32b8d11552
font_01_sfnt_off0000f303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF303 10000 bytes
SHA-256: c557bf5667305d0d75fbd44ecde214c3ffbd6f843fde53e6bcadbb3fd2ef3a3d