Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fead505bd90ab8a…

MALICIOUS

PDF

70.1 KB Created: 2020-11-18 12:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 671ad690118da7abdcc715243ee4de5d SHA-1: d9e0c64a103cde06440dfea7370d6aad26e2ccd2 SHA-256: 4fead505bd90ab8a7e44b8046af787b28cfbc7e2bf4d87c446732deb3f739648
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/strik?utm_term=carrera+de+zapatillas+cuento PDF link annotation
    • https://paviliwele.weebly.com/uploads/1/3/4/4/134489687/bb11659f3e703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421462/normal_5f9917e9e444e.pdfIn PDF document text
    • https://sulesebu.weebly.com/uploads/1/3/4/6/134634805/wuzem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_5f9114e29a95b.pdfIn PDF document text
    • https://dowamiwimeguv.weebly.com/uploads/1/3/0/7/130775936/legewisanoja.pdfIn PDF document text
    • https://nibafowezibinax.weebly.com/uploads/1/3/4/3/134319588/45af4.pdfIn PDF document text
    • https://laxigozi.weebly.com/uploads/1/3/4/3/134361341/9307520.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/052c2f5.pdfIn PDF document text
    • https://gujibimusexuwub.weebly.com/uploads/1/3/4/0/134042380/996838.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/37421800638.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/88405434921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2151918e-fe20-4564-8a47-e04a46f3cca5/faxikobesavexelipuxadupe.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_off0000d596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD596 5020 bytes
SHA-256: 920c0eeadf006273ef2d09bbd672ee5a3e93015dd156a6e2270b82b1bdbb81ce
font_01_sfnt_off0000e6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BC 10876 bytes
SHA-256: 2fa6b1c38aba520d2a70177d5fa7135022d081f06e348a43069eafa6daa81afb

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