Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd9644b92f9c52c…

MALICIOUS

PDF

64.3 KB Created: 2021-02-24 03:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bcc211b4c7afeb25798421004e6f40e3 SHA-1: 270252cb385ea25de3e7618af8d6fafb8eeb3383 SHA-256: 5cd9644b92f9c52c9fc89f4aa2ed1f31af72027d9f9908007df9aa495d86b3d8
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

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://seumenha.ru/123?utm_term=craftsman+cultivator+attachment PDF link annotation
    • https://cdn.sqhk.co/gubujurit/jcggifU/jazz_world_manage_your_jazz_account.pdfIn PDF document text
    • http://towumodoxilokox.22web.org/dutawarigimokovositegipi.pdfIn PDF document text
    • https://cdn.sqhk.co/poxirowo/Sja93aD/nokia_bounce_game_cheat_codes_tips_and_tricks.pdfIn PDF document text
    • https://fepexugoroba.weebly.com/uploads/1/3/4/4/134469665/9814802.pdfIn PDF document text
    • http://zegoves.22web.org/37059758724.pdfIn PDF document text
    • https://kexexetipo.weebly.com/uploads/1/3/4/8/134897314/guranilafetuzu.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/susozus.pdfIn PDF document text
    • http://nimurifewitofa.22web.org/cisco_ngfw_2130_datasheet.pdfIn PDF document text
    • https://dutumeparozawa.weebly.com/uploads/1/3/1/1/131163590/tivaxotof_xanur_dizorov_tadivunube.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebosatu/RRlar1J/download_jungle_monkey_run_2_mod_apk.pdfIn PDF document text
    • https://javabudonoban.weebly.com/uploads/1/3/2/6/132683403/lazarejezanezew-baxenu-gafanu.pdfIn PDF document text
    • https://cdn.sqhk.co/jawubibegeba/ial2gdF/watis.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/nfdHjjC/pupps_rash_after_delivery.pdfIn PDF document text
    • https://daxusumupazi.weebly.com/uploads/1/3/4/7/134702932/8635238.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/ajhjd9k/sadutajejuvaso.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/jixeremipet/calorimetry_practice_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/bluetooth_para_pc_gratis.pdfIn PDF document text
    • http://nizexududitew.epizy.com/adamina_font_free.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_off0000bf57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF57 5088 bytes
SHA-256: a2aad285c3bf95b2c4ac750c07d67aea6b52688c23d8a3f897c853bfb4dd4f3f
font_01_sfnt_off0000d07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07F 10540 bytes
SHA-256: ed378f6432da955104598a351109368b26fff8d549e49fd265fe1e6b9edb4df6

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