Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c7d41d4ea512da…

MALICIOUS

PDF

72.3 KB Created: 2021-02-11 18:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 08f2c6fbb0d2ace5d4ab34f20057f84b SHA-1: 25c8fd23ad3bca02511bfd424a418092a264dcc8 SHA-256: 34c7d41d4ea512dace2e8e0a7a38c5f068ef5e71c836daafc1c6b1101dbd4fb8
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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/wix?keyword=american+anthem+modern+american+history+online+textbook+pdf In PDF document text
    • https://wixivowid.weebly.com/uploads/1/3/4/6/134689466/zavenu.pdfIn PDF document text
    • https://nujawarasut.weebly.com/uploads/1/3/4/3/134310583/4431203.pdfIn PDF document text
    • https://tovuwofox.weebly.com/uploads/1/3/4/7/134731163/zilaniwijuzena-romeraxoganevu-wusozupimata.pdfIn PDF document text
    • https://mefutugotipefij.weebly.com/uploads/1/3/5/3/135304762/75d73ba.pdfIn PDF document text
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/xorifefesanodi_wejuxufodare.pdfIn PDF document text
    • https://puxamosawakexa.weebly.com/uploads/1/3/1/3/131381243/8476317.pdfIn PDF document text
    • https://lozepexowazabi.weebly.com/uploads/1/3/1/4/131409761/1721795.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487927/normal_5ffa5bebe0a3a.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/0hGgezt/mujak.pdfIn PDF document text
    • http://zomusip.iblogger.org/xezokolirapefafonijux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sudipefenivu.rf.gd/77689376925.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/lagu_angklung_carehal_juragan_empang.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_off0000dc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC99 5760 bytes
SHA-256: 0ef848dd553f13daa53c5864e159c2e6f4b7b1e569f8aa6641c2c9a4cfabb480
font_01_sfnt_off0000f014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF014 10440 bytes
SHA-256: 4bb6c9a3f7d05adb15612f175f40f592dbb206f8f649ab5b4580419818f12b7c