Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74dc956e645df27…

MALICIOUS

PDF

77.2 KB Created: 2021-04-26 14:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6d0dd8a88b0ac16b97649a1af8b015a0 SHA-1: 710080344cba37f5227374aa48935088af1f2032 SHA-256: e74dc956e645df274c62cf2608ef0efd9db842c16310446b4228496554009255
186 Risk Score

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 0.9997

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://baarspo.ru/strik?utm_term=2017+harley+touring+service+manual+pdf+free PDF link annotation
    • https://cdn.sqhk.co/zamokaxu/cjixvY3/swordsman_vr_update_1._10.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/anthropology_books_for_ias.pdfIn PDF document text
    • http://vupiziriwopo.22web.org/76790830132.pdfIn PDF document text
    • https://cdn.sqhk.co/menodotitit/ICgjhje/calcular_iva_colombia.pdfIn PDF document text
    • http://mevesepegubisis.scienceontheweb.net/watermark_acrobat_reader_dc.pdfIn PDF document text
    • https://cdn.sqhk.co/razilipot/ctgj3n7/17843849060.pdfIn PDF document text
    • https://cdn.sqhk.co/vusabutam/fHoSUie/24413427377.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_cd964dc266e547a4ae3a023468dc8f95.pdf?index=trueIn PDF document text
    • http://nuzelego.rf.gd/conformado_de_plasticos.pdfIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_e0f078cccab4452889ebefe0a2dd8fee.pdf?index=trueIn PDF document text
    • https://3c86e5df-9a55-47dd-9d5b-c207b25ec6cd.filesusr.com/ugd/72bf36_bd097b67cfed4657ba1a7f7b131afc91.pdf?index=trueIn PDF document text
    • https://4694dce0-4d1e-4c77-b4da-d1f025f82355.filesusr.com/ugd/fb332b_c04df7a4ca89471c847fc4a9f11110b6.pdf?index=trueIn PDF document text
    • http://nasakitubaribud.rf.gd/pdf_to_word_file_editor_online.pdfIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_ac3fbbc04f254d248928efa49d34fef9.pdf?index=trueIn PDF document text
    • http://rejojifokesix.rf.gd/konewowojoxozovun.pdfIn PDF document text
    • http://xipijoxog.rf.gd/56993305331.pdfIn PDF document text
    • http://dogekozi.epizy.com/76246407117.pdfIn PDF document text
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_5708699e584d4b0bb03fc1a605f174b3.pdf?index=trueIn PDF document text
    • https://d8d691c7-cf48-432b-bece-a54604b57851.filesusr.com/ugd/1e3a4b_ffcdb29157aa4bcebce51fa0496e9c32.pdf?index=trueIn PDF document text
    • http://basifotu.epizy.com/caliban_s_war.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_off0000ec12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC12 6044 bytes
SHA-256: 38a032ec4b7c039c010c0bac1be3c740dbd1b5fe96e840d0ed5a15ca7fd0afc8
font_01_sfnt_off00010093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10093 11392 bytes
SHA-256: 59b9b8062af15d8a8262b4c422c0d89f6ec243abc30b97666672de309fd65bf0

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