Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a5df5ffd7a78647…

MALICIOUS

PDF

76.1 KB Created: 2021-02-19 19:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ef3d9c8c65169ac0537998f5feda32ed SHA-1: 49b7f9a2cd5c4053c25170e5d210963d9efe524a SHA-256: 2a5df5ffd7a78647d3d8d9c329673494f7e8a5e17f9ae6a2efb224dfebb9bc46
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://jacksth.ru/123?utm_term=huckleberry+finn+sparknotes+chapter+23 PDF link annotation
    • https://cdn.sqhk.co/tadawatimi/ejge3gf/logo_nasa_natural_nusantara_png.pdfIn PDF document text
    • https://cdn.sqhk.co/tesadubozino/BbC2jhI/valitateriwum.pdfIn PDF document text
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/3114377.pdfIn PDF document text
    • https://pedamajemekiju.weebly.com/uploads/1/3/1/3/131380885/086029a6879.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/jelheR2/numuvabanisaxela.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/57DKWxC/casa_superhero_run_richmond_va_2020.pdfIn PDF document text
    • http://zupurowuzuxule.iblogger.org/brother_online_user_guide_mfc_l2710dw.pdfIn PDF document text
    • https://rupogasonewu.weebly.com/uploads/1/3/4/6/134653860/vatumonudexa.pdfIn PDF document text
    • https://supogile.weebly.com/uploads/1/3/1/6/131606666/f28d797a10c8e6.pdfIn PDF document text
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/xutawofi_serinelow_wixujitaxej.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/gggijcA/free_mp3_voice_recorder_for_pc.pdfIn PDF document text
    • http://smartcreditscore.info/miranobewiteme8jys.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/cijgha3/dragon_ball_super_stickman_fight.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/kimone/brche_aufgaben_6_klasse.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/soxepabezegovivuba.pdfIn PDF document text
    • http://kixozixid.rf.gd/59489036928.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/bonizegop.pdfIn PDF document text
    • http://jejivosijej.rf.gd/angular_4_bootstrap_dashboard_template_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_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 5664 bytes
SHA-256: 0971099f7edea2d9a53b28eefc1e12803b02fcacde9a9d50da696d760bdf5d2e
font_01_sfnt_off0000ffe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE5 10516 bytes
SHA-256: 08aae5f3507efc4d10ca0e37b1af04875d52237c046fbb384e9fe6b07ab64fc1