Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64fc71370b48a0e…

MALICIOUS

PDF

72.9 KB Created: 2021-02-14 19:11:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 67dfc387d722f03cef4120a3556298a2 SHA-1: 4af8b8d83c33e4527c117815120e183de3aa89de SHA-256: d64fc71370b48a0e57a49751d82cc2df25e28ba5b4657235703434289d283a4e
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/aws?utm_term=annotated+bibliography+apa+example+format In PDF document text
    • https://cdn.sqhk.co/kamozipu/fcMjjCB/45336477949.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374203/normal_600dc9d675132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405654/normal_6024ac7059cb4.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/jayha0U/zuxosazemiwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_600d9a7956e01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426556/normal_5ffd6faf2e8a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499629/normal_6007b219a09ba.pdfIn PDF document text
    • http://wegasanapifare.iblogger.org/85619020484.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416792/normal_5fefabdc4a82c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401732/normal_600fa6a7b50e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lexuwusifo.epizy.com/flow_sheet_of_iron_ore_beneficiation.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/vampire_diaries_season_8_subtitles_english.pdfIn PDF document text
    • http://zoratazux.epizy.com/12188072202.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/sorabebez.pdfIn PDF document text
    • http://didazejitikav.rf.gd/mokofoledipeza.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_off0000dff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF6 5576 bytes
SHA-256: 8e635fc725ecd93b3b55d900246e9ea82c407d5b281e9d7dbff56a398c2c3bbb
font_01_sfnt_off0000f2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D1 10520 bytes
SHA-256: 7d5078fff522be950356c08d2a741ca4a31fb1b8ab2f987011197ef2011944c1