Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c7ce9c36916531…

MALICIOUS

PDF

146.0 KB Created: 2021-03-21 00:25:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 573151ce40dbe27df2f36210c779984a SHA-1: a0b15861e667e90254e222a59313d61b3c24e4c5 SHA-256: 01c7ce9c369165312d869a65118d3a649c82cf47a701adf7a0ac94d273ed0d0d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious sites, possibly for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://kuzutuzo.ru/123?utm_term=guided+reading+level+for+4th+grade PDF link annotation
    • http://rajelakitapeki.iblogger.org/45777938082.pdfIn PDF document text
    • http://startask.ru/sunakowaralejoraparepn7vt.pdfIn PDF document text
    • https://cdn.sqhk.co/sifilefu/bixiasR/28832257083.pdfIn PDF document text
    • http://xteenware.online/gonobaxugexevorovomavogmk0qq.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/4980128928.pdfIn PDF document text
    • https://cdn.sqhk.co/gobisurav/jiMjggi/zara_man_size_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/hHibidP/drive_safe_and_save_app_keeps_crashing.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/hdthjih/easy_wallet_nfc_apk.pdfIn PDF document text
    • http://shoop-fp.ru/869062505328nogs.pdfIn PDF document text
    • http://dogorove.22web.org/fonunijuxafaz.pdfIn PDF document text
    • http://sutivetowit.mypressonline.com/lego_harry_potter_5-7_codes_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/NjhzQmv/hospital_pick_up_and_drop_off_service.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/munivaxodafuxadovogatuto.pdfIn PDF document text
    • http://jerunuju.mypressonline.com/congo_civil_war.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sojopisosifa.epizy.com/88543739634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5faeed63-dde3-44cf-bc88-20addab8fbb2/wuxutatolojadutogawuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2184fa89-10a5-4b09-9571-99de4cf037d7/91739160149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4328246-d502-4b2f-8f61-082576703871/grokking_deep_learning_in_motion.pdfIn PDF document text
    • http://wixesikive.epizy.com/jinuputuximobi.pdfIn PDF document text
    • http://fiwipofel.epizy.com/22502204644.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

Related samples 8

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_off0001fecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FECF 5168 bytes
SHA-256: b390bee49dfeea86bce2c48450166edfb1dbdc92572288faa636312ea0193eba
font_01_sfnt_off00021071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21071 12132 bytes
SHA-256: 81ef0af766986e2837e78ad27a616394775eed6ad3421eef4acaa870c45b6f04

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