Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc24a0c300255bce…

MALICIOUS

PDF

162.9 KB Created: 2021-03-24 20:20:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 77d8668fd211adb0678a2edf109177ab SHA-1: b794a39fba2cfb7cf36507dde31bad6a1aa882c7 SHA-256: fc24a0c300255bceacc389c9b7a55e78be0e71867e68b0115f6f0e0307897ca3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a large number of links on low-reputation hosting. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/strik?utm_term=sony+a6300+vs+a6400+vs+a6500+vs+a6600 PDF link annotation
    • https://pivufuzonopovi.weebly.com/uploads/1/3/4/5/134588588/xisag.pdfIn PDF document text
    • http://vclean-sale.shop/felujifulisubivapivuy3x0.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/Wn2AHjb/gikufu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484154/normal_6016b34a1e41a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417206/normal_6040ec53ef9c0.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvuxemoguf/igViijj/bluetooth_music_player_app_for_car.pdfIn PDF document text
    • http://premium-cinema.com/who_invented_mathematicsd60vd.pdfIn PDF document text
    • http://axecheat7.xyz/carrier_weathermaker_8000_owners_manuale3eqj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405413/normal_603fa060b4fe0.pdfIn PDF document text
    • http://xemokajoled.medianewsonline.com/luftfeuchte_tabelle.pdfIn PDF document text
    • http://extrameets.fun/fred_factor_trainingx0rle.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386091/normal_5ff20a8a62b36.pdfIn PDF document text
    • https://bepikirutufuw.weebly.com/uploads/1/3/4/8/134866592/jigev.pdfIn PDF document text
    • http://tehnotop.site/niboponb9rk3.pdfIn PDF document text
    • http://soinjaga.ru/evolution_cladogram_worksheet_answerszgyu3.pdfIn PDF document text
    • https://jufazikifu.weebly.com/uploads/1/3/4/3/134316902/fopojojepe.pdfIn PDF document text
    • https://cdn.sqhk.co/loxosefivipo/2xTuFgh/1991_volkswagen_cabriolet_owners_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420431/normal_5fd22791af887.pdfIn PDF document text
    • http://milky-rp.space/wuxuwemosazoxivufezokudebx55z8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rugoxesoteko.myartsonline.com/86183343078.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10614 106356 bytes
SHA-256: d8215bb9e304150fe283c9c5740e34d52300f77ac53a8f975f6fe3aa0ebf93a0
font_01_sfnt_off000240c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x240C5 5488 bytes
SHA-256: 25548fecc69f2099296b0f175a001473dc916a01229ab9b65840f968510f9f58
font_02_sfnt_off0002539f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2539F 11488 bytes
SHA-256: 4ec0eabbb08b2fbe3c9d6487c8894a9ed463ee087466a280d6a1730ffd8340ac

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