Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b21bf0a423331d…

MALICIOUS

PDF

77.9 KB Created: 2021-02-09 01:30:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 996ff9c151cb405bcc88441bebb752b3 SHA-1: 4d782fc458d56daa0601052e35e40db4abf9aa62 SHA-256: 20b21bf0a423331d38aba501f2652b9b4caab405d04e431d6bac94149579e22b
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://jottigo.ru/wb?keyword=collingsworth%20family%20fear%20not%20tomorrow%20sheet%20music PDF link annotation
    • https://cdn.sqhk.co/vixukose/ejipjyg/my_first_piano_adventure_songs.pdfIn PDF document text
    • http://rollernefrit.xyz/96946080454o5ei.pdfIn PDF document text
    • https://cdn.sqhk.co/zopinulepa/OigYihd/vuzujematawijof.pdfIn PDF document text
    • https://cdn.sqhk.co/neliwuwo/5W12jjf/fidimizujoxewefopoderum.pdfIn PDF document text
    • https://xidoxuzi.weebly.com/uploads/1/3/4/7/134707988/4144e0ac3827cf7.pdfIn PDF document text
    • https://rujuzodojavumip.weebly.com/uploads/1/3/4/7/134726220/dd323b7c3d.pdfIn PDF document text
    • https://firiwipavixura.weebly.com/uploads/1/3/1/4/131407767/buwipo.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/jdiceii/96956538376.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/trhfjws/osrs_cannonballs_xp_per_hour.pdfIn PDF document text
    • http://neyroskakalka.site/gumball_games_darwin_s_yearbookiqngx.pdfIn PDF document text
    • http://good-production9.site/56173829189wfz5e.pdfIn PDF document text
    • http://jadebey-x.com/kapef1slbu.pdfIn PDF document text
    • https://volorizog.weebly.com/uploads/1/3/1/0/131070051/5074597.pdfIn PDF document text
    • https://judenebubiz.weebly.com/uploads/1/3/4/6/134656374/mefogiw.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/dejazuvorira/nursery_rhymes_songs_with_lyrics_free.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_off0000f380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF380 5396 bytes
SHA-256: 3bf071670654aa9e006726e733d4f26587bb36b6726385ee7ad2e9b7038cafcc
font_01_sfnt_off000105c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C9 10764 bytes
SHA-256: e2cb176736faeab82deefe509e1661f2b16ff97f7e598f49b6c264cf06bc8968