Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b4fe71219ad537…

MALICIOUS

PDF

80.2 KB Created: 2021-02-12 17:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a9ae088627e5246f43d3189e6bc942ef SHA-1: b8f4b6453ca1af61ceeefbb286541c3f454e7f6f SHA-256: c6b4fe71219ad537a64b9329d28c0b781d8519dc4b5906d20cd78db62018a438
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/wix?keyword=bandsaw+blade+guide+blocks PDF link annotation
    • http://wuwodijutorem.iblogger.org/time_inception_sheet_music_patrik_pietschmann.pdfIn PDF document text
    • http://xevozunufu.iblogger.org/lazezexavisavukoketaj.pdfIn PDF document text
    • https://cdn.sqhk.co/digiwejasipu/djb0iha/mirobudapat.pdfIn PDF document text
    • https://nedijevir.weebly.com/uploads/1/3/1/4/131406348/9327561.pdfIn PDF document text
    • https://cdn.sqhk.co/riwutosax/hgKjaKf/do_not_touch.pdfIn PDF document text
    • https://cdn.sqhk.co/jasowipe/aAhhvrC/97890934750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5fe8951f4926d.pdfIn PDF document text
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/jogogeka_popavusu_josolizekixuvuf_ruzujij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5fd0d5d51c72e.pdfIn PDF document text
    • https://febosefukeja.weebly.com/uploads/1/3/5/3/135324858/favijukawopevi.pdfIn PDF document text
    • https://nolipugi.weebly.com/uploads/1/3/4/6/134652161/sewevudaginigu_wogiwafut_leraxuw.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/gdjhhfi/58141279272.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/vabedafozo/zavibizovamiliwozale.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/pajiwowug.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/51121125785.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_off0000fed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED3 5356 bytes
SHA-256: 6a5f7b0baf3fee237cc6cd9386e3846692368fafdf607aef041aea202493fbfa
font_01_sfnt_off00011138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11138 10196 bytes
SHA-256: 67d3d5341c9381f3de0ac061d46d8f11d73323eff184a5bd114fd002da2cb987