Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc1b991bffc06be…

MALICIOUS

PDF

93.9 KB Created: 2021-03-15 07:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 05f097d161e80c401131338a9fddf623 SHA-1: e5b6a5dab88a6fcba20f402ba3e9a48c458f270e SHA-256: 7cc1b991bffc06be93b3356f01e74b5e36e3221d3b433ad1f0912811764335d2
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to known malicious redirector infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to a 'study guide'. The presence of numerous links on disposable hosting further supports a phishing or redirection scheme. No scripts were extracted, but the primary attack vector appears to be the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=my+side+of+the+mountain+study+guide+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_604ac9601846b.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/2468519928.pdfIn PDF document text
    • http://disetikala.22web.org/john_deere_x320_for_sale_nz.pdfIn PDF document text
    • http://balifruit.com/442595599168z33o.pdfIn PDF document text
    • http://hairsprof.ru/gestion_de_la_calidad_total_cuatrecasas4j3e9.pdfIn PDF document text
    • http://zukixulen.mypressonline.com/4839537458.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/pixabevex.pdfIn PDF document text
    • http://chisto-chisto52.ru/que_significa_el_titulo_como_agua_para_chocolate3o9ud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499317/normal_6000b4434b650.pdfIn PDF document text
    • http://joxitikoki.getenjoyment.net/betukiladinerurerupafiduf.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/gidorapuwatodune.pdfIn PDF document text
    • http://boketizabujig.scienceontheweb.net/logopavakaxaw.pdfIn PDF document text
    • http://moneyindia.site/zenubirejaxaxesiv69mi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469631/normal_600767c8919f0.pdfIn PDF document text
    • http://drive4mclaneeffingham.com/ritumisavp11b.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/69244589563.pdfIn PDF document text
    • http://hempmap.ru/941072456218r76t.pdfIn PDF document text
    • http://handler-autoscout24.com/supply_chain_management_education_programs32r11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5fd7b7959d056.pdfIn PDF document text
    • http://zathkatow.xyz/skype_portable_heisen2d45.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pedirite.onlinewebshop.net/why_is_my_epson_xp_320_not_printing.pdfIn PDF document text
    • http://pobavawekede.rf.gd/xazegubifapakezavotilona.pdfIn PDF document text
    • http://gaxunexuxulaxed.epizy.com/biwedetolekevomalunikiz.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_off00012d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9B 5432 bytes
SHA-256: 1c1a540e97b784379c76367d424c12f63dfe44b79e7555a915dde6683e927b25
font_01_sfnt_off00014010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14010 12752 bytes
SHA-256: 88e3ad9b38601a297048887bce5ea01acaffa95987c6d237acb1c9179f4dabc1