Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c6af15bc5c7648…

MALICIOUS

PDF

76.7 KB Created: 2021-02-25 18:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2808ad8306ad1ce777b8a7be1beb53f2 SHA-1: 0649d7e5f2f0ad708856c0d6cbe62cca5ff85549 SHA-256: 64c6af15bc5c764820d87c64c8ea96021d303097bc0df157e6cc6e177c53ca52
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a malicious intent to redirect users through a network of potentially harmful sites. The ML classifier and ClamAV detection further confirm the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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=pit+bike+races+ca PDF link annotation
    • http://sanatoriy-izumrudny.ru/83177943450f6w3e.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/raYgeic/beliranip.pdfIn PDF document text
    • http://loveantravel.xyz/material_requisition_form_templatesgwho.pdfIn PDF document text
    • http://remont-pc.website/dotuvumeldgmep.pdfIn PDF document text
    • http://luchdobro.site/sandisk_sansa_clip_zip_firmwarerd6ki.pdfIn PDF document text
    • https://cdn.sqhk.co/gisusisabez/cc1JXih/bikutibipale.pdfIn PDF document text
    • http://erse.xyz/tere_chumme_me_song_wapkingymww0.pdfIn PDF document text
    • http://cloudmarket.website/47723146128v3edt.pdfIn PDF document text
    • http://cancandance.org/light_effect_png_hdu7jsq.pdfIn PDF document text
    • http://sobakin.space/persuade_inform_entertain_chart79d7u.pdfIn PDF document text
    • http://successinyourlif.website/aparichit_movie_dialogueddrbt.pdfIn PDF document text
    • http://svarka-aurora.online/aggiornamento_android_galaxy_s8cc8r8.pdfIn PDF document text
    • http://prizinsta.site/animal_farm_novel_in_urdu56t8m.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/exgdjes/big_bang_theory_army_ants.pdfIn PDF document text
    • http://obzorov.site/butudopaxo2pkb9.pdfIn PDF document text
    • http://lestyprin.online/temizuq96eu.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/pomimuxuguk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E5 4968 bytes
SHA-256: b343f8006c1e6d37ea35726fe04622c013a5d4a6344895324f5676a4658c8d7a
font_01_sfnt_off000102d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D6 10380 bytes
SHA-256: 302189bb9e855e322504e78749c5a2ef23aa034fc382483a9db7dd583847a193

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