Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdca448bc80c6f79…

MALICIOUS

PDF

96.9 KB Created: 2021-04-01 06:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0f0302bb0eabb01a1a2723c4adc39e43 SHA-1: 1575a1e2dc9d0a3961a6798430e95a123611eed0 SHA-256: cdca448bc80c6f79d215f0593c72ac886d43d004495064b5bac2600a5dbd5a7f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/strik?utm_term=balancing+chemical+equations+examples+pdf PDF link annotation
    • https://cdn.sqhk.co/vixemujomu/QPhdEhL/street_racing_lock_screen_iphone.pdfIn PDF document text
    • http://wacc-cat.org/78135751585khd6w.pdfIn PDF document text
    • http://meblik.su/law_like_love_analysiscka2d.pdfIn PDF document text
    • https://benipotuwazel.weebly.com/uploads/1/3/4/4/134445242/8416245.pdfIn PDF document text
    • http://persequen.com/jilakevos4ih.pdfIn PDF document text
    • http://xikumidevulofo.iblogger.org/breath_of_fire_2_snes_manual.pdfIn PDF document text
    • https://dilozekilofak.weebly.com/uploads/1/3/5/9/135968706/fumobibulerexez_tamarapofilirop_satax.pdfIn PDF document text
    • https://cdn.sqhk.co/gujurolekuma/j5hhAjb/lineage_2_revolution_dwarf_slayer_guide.pdfIn PDF document text
    • http://hangookoil.ru/xokewekaf5zdeg.pdfIn PDF document text
    • http://life-news.tech/979429528954znu.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/iijfjd6/pusozutinitadolomanapedab.pdfIn PDF document text
    • https://cdn.sqhk.co/zirixegip/g2jecyg/lighthouse_point_florida_to_miami.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/interior_decorating_courses_in_south_africa07z6x.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/bhdhdGd/viking_saga_2_new_world.pdfIn PDF document text
    • http://tradestaroffice.com/razabolusq12.pdfIn PDF document text
    • http://lavka-karamel.ru/campaign_strategymi6a4.pdfIn PDF document text
    • http://andyhongdigital.com/xajogaa2sp7.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/jSge2jc/ates_ve_su_1_oyunu_oyna_oyun_skor.pdfIn PDF document text
    • http://wiinorama.fun/why_is_my_subwoofer_not_connecting_to_soundbarf8jr5.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/hwYzeet/78452921734.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://futisilatixukep.rf.gd/carolina_hurricanes_schedule_2020_19.pdfIn PDF document text
    • http://gudonuwoponiri.rf.gd/lufubomaf.pdfIn PDF document text
    • http://pudofekulud.rf.gd/how_to_program_dish_remote_to_joey_receiver.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001221b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221B 5716 bytes
SHA-256: cc133bf18354ef49c0e596dd920ec5f9fe992a886e3c24942754f4ab348b6b4e
font_01_sfnt_off00013570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13570 12592 bytes
SHA-256: 807ee3826e4492be9830340b9ffe832f9486c2f986e40e8d44ea6120e4f09c6a
font_02_sfnt_off00016093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16093 16140 bytes
SHA-256: e519f4e4ac6d9b0f57dce0c0d49b484e4d1d842646fa75230b4829220ba81c73