Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d05cf9fbb18724b…

MALICIOUS

PDF

74.5 KB Created: 2021-02-18 01:23:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f57c05a99bb0e6a9e1aac24343c77bd5 SHA-1: 517f5440c1074beff1a36138b22e0dfe96dbc7ba SHA-256: 3d05cf9fbb18724b9b0286903f4be0e39e4f4e8184a01fa2c65f45bbb0ee2e76
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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=architecture+drawing+tablet PDF link annotation
    • https://zapotaputilaka.weebly.com/uploads/1/3/2/6/132683001/5679061.pdfIn PDF document text
    • https://cdn.sqhk.co/nakizenonetu/dghWijo/neo_marxism_definition_sociology.pdfIn PDF document text
    • http://dvigatel.guru/4551400519m6nx.pdfIn PDF document text
    • http://visionnew.xyz/givamarezilimuwipiltw89o.pdfIn PDF document text
    • https://cdn.sqhk.co/pegiridireva/dBhje6f/arenanet_guild_wars_2_login.pdfIn PDF document text
    • https://vigagexagadip.weebly.com/uploads/1/3/1/8/131856194/65d70439.pdfIn PDF document text
    • http://hookup158.fun/41751078763cybqg.pdfIn PDF document text
    • https://vavetoros.weebly.com/uploads/1/3/4/8/134854671/runagi.pdfIn PDF document text
    • https://cdn.sqhk.co/sewujuzanas/hcoaPhj/grocery_list_app_iphone_shared.pdfIn PDF document text
    • https://wufikaxom.weebly.com/uploads/1/3/4/8/134883002/3b66b95.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/VMbqhgL/top_free_ringtones_for_iphone.pdfIn PDF document text
    • https://nusiteraj.weebly.com/uploads/1/3/5/3/135347212/xakurawenononijab.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/printable_world_map_with_countries_labeledpkek6.pdfIn PDF document text
    • https://komutezux.weebly.com/uploads/1/3/1/3/131398036/nudodexobo.pdfIn PDF document text
    • https://laxoweveludek.weebly.com/uploads/1/3/0/9/130970009/9bd16b6927c76f0.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/eidwfV6/susofa.pdfIn PDF document text
    • https://fezipogapatud.weebly.com/uploads/1/3/4/8/134888370/manibi.pdfIn PDF document text
    • http://kefets.xyz/10006131007kmh9n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57A 5244 bytes
SHA-256: 3bfe5ed1a61136e4007c3622b3d8ca0827db037aa50a293a498947c983800039
font_01_sfnt_off0000f75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75A 10948 bytes
SHA-256: c879e4552a2fac44a71dea18f61efcd90bd764396cb98cf16bc27e433d4d115d

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