Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ce7e9c6c8f86d9…

MALICIOUS

PDF

68.1 KB Created: 2021-02-11 14:39:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 62466981aa0a172ac015e34840fb6dd1 SHA-1: 07c7ed466f0be5652015e5d8764955c8b28dc5e9 SHA-256: d6ce7e9c6c8f86d9a692d888597b3227b0b24930b571ba7081c1723c2d0689ba
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and known malicious redirectors, indicating a phishing or malware distribution attempt. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and ML_NYX_PDF_MALICIOUS strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/wix?keyword=probability+word+problems+worksheet+with+answers+pdf+grade+6 In PDF document text
    • https://cdn.sqhk.co/remimidotomi/igehe7x/best_will_herondale_quotes.pdfIn PDF document text
    • http://subonus.ru/43082846268sdcji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451971/normal_5fdc10036866f.pdfIn PDF document text
    • http://casbah2point0.com/bs_online_gestion_de_ficheros_manual01hvv.pdfIn PDF document text
    • http://organic100.fun/lego_batman_the_video_game_mod_apkfvx51.pdfIn PDF document text
    • http://itanah.space/88558447372k5jso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376866/normal_5fe70dab8faad.pdfIn PDF document text
    • http://kfnwejfnkwheklf.space/yiruma_maybe_sheet_musicjhcxq.pdfIn PDF document text
    • http://testvvd.xyz/vulawiwufarafoxarupzr949.pdfIn PDF document text
    • http://martakkord.ru/totarez5krgv.pdfIn PDF document text
    • http://christinaanddavid2019.com/kevumoniveloki6rcog.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/iaes8jf/translate_romanian_to_english.pdfIn PDF document text
    • https://cdn.sqhk.co/pulizojiwim/ynPZieq/tip_top_funny_video_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/qjcKDgh/20640397540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403283/normal_601f56600cfa9.pdfIn PDF document text
    • http://copyrightshelpscenters.com/bacteria_and_viruses_worksheet_answersowwn6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lenawevurokolup.epizy.com/cervical_cerclage_procedure.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_off0000ca48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA48 6008 bytes
SHA-256: ebef3d027cd53430d0153c923c0518738e8677e3d887fc2a2119d1e1d3702445
font_01_sfnt_off0000deaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAA 10496 bytes
SHA-256: c7782b6c71a9e707452a042da7df1e10a0c830128f6005042719c592d21ec29c