Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0503dd38a40f5d3…

MALICIOUS

PDF

94.9 KB Created: 2021-03-23 02:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cd243d1f9e18a3df7dd5cf9e6d6f3957 SHA-1: 9f0fcb3986cb071ba911429de49b641ab6374d99 SHA-256: c0503dd38a40f5d3d33bf190cb6681a53707c310423ffb987625f397749b4ffb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://seumenha.ru/wix?keyword=the+great+gatsby+chapter+1-2+study+guide PDF link annotation
    • http://bafakuvim.sportsontheweb.net/20679763917.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/jjjhgee/101_fun_escape_games_level_14.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/gagetopurefepulo.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/rusiduzopuzis.pdfIn PDF document text
    • http://rekugegik.scienceontheweb.net/vikediwunuf.pdfIn PDF document text
    • http://xazowagef.mypressonline.com/mopumube.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/66846970595.pdfIn PDF document text
    • https://cdn.sqhk.co/rumoligodo/5frUibv/xuxoxan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://reladefuxuna.onlinewebshop.net/94042856824.pdfIn PDF document text
    • http://bigerubuseke.rf.gd/19062353510.pdfIn PDF document text
    • http://vawinujofupin.myartsonline.com/amazing_grace_violin_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60066e5c-c909-4e42-a94a-27a67325b063/manual_network_selection_iphone_11.pdfIn PDF document text
    • http://pumatelikowe.epizy.com/40821393830.pdfIn PDF document text
    • http://zodofujeki.atwebpages.com/gifivuwelixixupevusojaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5893fa55-d8f7-4199-bc6a-787f74c22791/20867983155.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_off000134da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134DA 5708 bytes
SHA-256: 522ee71bd53c7fc67a1e2a5b3d5e8710735bf683fb28040832c8367f69466945
font_01_sfnt_off00014855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14855 11204 bytes
SHA-256: e8cee2da23dbaed3f92b7b421da2884f2f29f1ac52cf18afc0d61e8ada6f2b3b

Open this report in the interactive analyzer, or submit your own file for analysis.