Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fca01562ef44740…

MALICIOUS

PDF

64.9 KB Created: 2021-02-09 02:21:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6417ed2d1e5e9eb04f32eae8221170c5 SHA-1: 6c8445f347c92754b9303292523162bcb7f6bb43 SHA-256: 5fca01562ef44740a1fceb29d87c2cde87d535e59949cc51f3697bc3ba95eb9d
252 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=lagu+dj+via+vallen+lily In PDF document text
    • http://iranianvc.com/sexolevemilewewiwarupetaj7hz6i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485149/normal_5fd348d438ddc.pdfIn PDF document text
    • https://dezuvamugofa.weebly.com/uploads/1/3/4/1/134131805/gulaja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447253/normal_60012ebebe3b4.pdfIn PDF document text
    • http://tegogigagozij.iblogger.org/vans_classic_platform_black_and_white.pdfIn PDF document text
    • http://najapizarut.22web.org/blender_2._8_shortcut_keys.pdfIn PDF document text
    • http://rezltml.xyz/kelebein_ryas_izle_tek_para_dailymotiont9nt4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464065/normal_602167d1c31c8.pdfIn PDF document text
    • http://naturalm.space/gitapipekugivipusilagawhxt0v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409609/normal_5fe903accf6f8.pdfIn PDF document text
    • http://lijovafe.22web.org/buwag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450438/normal_6000b0d1dca7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478414/normal_601fa9fe4b42c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445325/normal_5fe1530803706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461766/normal_6020b859dcc0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC12D 4896 bytes
SHA-256: 53c8ac18c8febf67dd847dd2fdc054022d813d7eeb4c8f4ead851ea6f01fe045
font_01_sfnt_off0000d1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FC 11072 bytes
SHA-256: bf7310abd9fbc74313618595f7827ed808f7b1256410efc533622448439dd4fb