Malicious PDF — malware analysis report

Static analysis result for SHA-256 4252c5bce09f4fd1…

MALICIOUS

PDF

156.7 KB Created: 2021-04-08 08:39:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6bdbd9e3ed7e16cc7baf1b9ef80829f8 SHA-1: 217e0e65879976368c54c605784a85ff6dc56203 SHA-256: 4252c5bce09f4fd19337dda8ef07d78b5359d2ecf44082120d36ed4adbbd1651
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated, but the presence of external URIs and the link farm heuristic strongly indicate a malicious intent to lead users to potentially harmful content.

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/wix?keyword=takeru+hikari+fanfiction+tears PDF link annotation
    • http://lnstagramcopyrigtservice.com/neighborhood_walmart_near_me_now1usvv.pdfIn PDF document text
    • http://lg-supportteam.com/equipement_pour_rallye_de_rgularitc1nyt.pdfIn PDF document text
    • http://ashotik.space/tuvinudejetejedoseftudw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501383/normal_5ff3b8e528f85.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/hfvigjf/cares_child_care_scholarship_parent_application.pdfIn PDF document text
    • http://rm-swis-mine.com/samafurovetivorodupekujee6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499942/normal_60461f76bccf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403119/normal_5fd171d7951d6.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/bYshjii/niruzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466173/normal_6059cfb533442.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/hj71gih/77908415736.pdfIn PDF document text
    • http://liketime.online/corporate_finance_the_core_4th_editionurblv.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/acta_constitutiva_de_sociedades_mercantiles.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_f112598c7bb745d39962e21c309557e1.pdf?index=trueIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_aa04d27b64c24ba6af09ec9aa8ebf29b.pdf?index=trueIn PDF document text
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_d9ad203845ff44409872f24628399600.pdf?index=trueIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_6bb4d7d285164b20bab1842cb10d7cd1.pdf?index=trueIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_2351cd5fca304cc2b31f5ee7bee4cec1.pdf?index=trueIn PDF document text
    • http://lafagelupuf.myartsonline.com/80726313415.pdfIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_ee105234477145bd939d36fcca8c921e.pdf?index=trueIn 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_off00021e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21E73 4948 bytes
SHA-256: 6f60b5613e22ab49edc4a7b607032286ddfef95e0fe35e40305a868b56e52622
font_01_sfnt_off00022f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22F49 17736 bytes
SHA-256: 7ff66616cb7c23f4206fab1a41d99cf0197b6e3496800b594814714d5390b8bf

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