Malicious PDF — malware analysis report

Static analysis result for SHA-256 9513331c57aff248…

MALICIOUS

PDF

73.1 KB Created: 2021-02-27 23:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 9b6bd6db4aa66336a7681875c5e03ec4 SHA-1: ef380bbe1274af017fa773882a9ff15cfd2fd958 SHA-256: 9513331c57aff2489fa3306f9b7cf1473cf249b8acdaf327dd41285996197cd7
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially garbled, includes a search query that likely serves as a lure to direct users to these malicious sites.

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=les+miserables+movie+2019+cast PDF link annotation
    • https://cdn.sqhk.co/sesijisova/gj2Thja/pulenuvenam.pdfIn PDF document text
    • http://xifadezuzurap.medianewsonline.com/how_to_landscape_a_home.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/95410043560.pdfIn PDF document text
    • http://igme.site/gejepizupippzmq.pdfIn PDF document text
    • http://3bki.ru/349489820203up1c.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/what_is_not_an_example_of_critical_thinking.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/our_god_reigns_chords_key_of_b.pdfIn PDF document text
    • http://fresh-ita.fun/gelusimepesufudazikabrri8.pdfIn PDF document text
    • http://peskomment.ru/sobijebevagipagadifijuvjwjpa.pdfIn PDF document text
    • http://spainsale.pro/modirazerojesajak9pev8.pdfIn PDF document text
    • http://dkblogin-de.com/75832870291ox4pr.pdfIn PDF document text
    • http://argo-tourism.com/74109993363piu48.pdfIn PDF document text
    • http://slimitalia.space/660309890054ynue.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/jensen_jta-230_replacement_needle.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/can_you_wash_pellon_interfacing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tevefetilojas.atwebpages.com/11709558541.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/45036145821.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/pozidavo.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_off0000e077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE077 5568 bytes
SHA-256: 88fd246061a9dc41959ea1689fd0fd50edd24cb959036c0c8ee5fbe73afcada8
font_01_sfnt_off0000f356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF356 10708 bytes
SHA-256: c70f3259721a3e37df155db6e568f73aecf5426f5ea935680b790f85b66f4bcb

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