Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24838847e0d5e6c…

MALICIOUS

PDF

71.5 KB Created: 2021-06-10 23:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a59987850b62fdef17c29a6034ca3941 SHA-1: 0f69dc0d0397f4c8b60785b5fca553e50772c9b1 SHA-256: b24838847e0d5e6cb110f5a665ecc5602044d6e6a25cb2aecea604a1229fe912
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The presence of 'Clash of Clans hile 2020' in the document body and metadata indicates a lure to attract users, likely for phishing 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://cructi.ru/pbw?utm_term=clash+of+clans+hile+2020 PDF link annotation
    • https://famopenagunabot.weebly.com/uploads/1/3/4/6/134688774/72b85bd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446494/normal_6067378a95573.pdfIn PDF document text
    • https://vuwurata.weebly.com/uploads/1/3/4/4/134481670/firojovebuwuxuwo.pdfIn PDF document text
    • https://bazulezegit.weebly.com/uploads/1/3/4/3/134372971/vutezinibuz_fajerutolowag_dosavetofatirub_vufalivufelovo.pdfIn PDF document text
    • https://muguruxafo.weebly.com/uploads/1/3/7/5/137504582/filapelama.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466391/normal_603aa82735b50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417662/normal_6044217f79cb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463807/normal_5fd642ab7fcf4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c26a409-0b94-4f92-a34f-71ca2415aba4/supersu_apk_chainfire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/909aaf99-3e3c-4bf3-815c-1f64dd59258d/vatama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccbb194e-dc73-4ece-a747-c566daac8b76/worx_electric_chainsaw_18_inch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c860866-da9a-4ddd-9281-c8dc326d11d7/98337351553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/764f82f9-f77c-4368-9624-5f72a2046112/9129772417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a34a28-62a4-49b7-8edb-daeb222196eb/best_interior_design_programs_in_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01203561-f1e9-4030-b6c4-d7346ede30c7/fofapogifanebejagevexig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e20f83-85dc-4495-a2d3-9911e939aff8/mojidenifuzimokomijejota.pdfIn PDF document text
    • http://sorawako.pbworks.com/f/blackmagic_atem_mini_pro_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cc99660-62f5-4dd3-b38e-71b9b7bd837f/momumiwosasogakalanis.pdfIn PDF document text
    • http://ritijix.pbworks.com/w/file/fetch/144523311/is_ecological_systems_theory_continuity_or_discontinuity.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_off0000daab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAB 5052 bytes
SHA-256: 9fc0682d9eeeef9d20ba671033e5863210b86e6f70d17882420b485e524d20ee
font_01_sfnt_off0000ebd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD5 11272 bytes
SHA-256: 71281276e2ef3dca17c6b680d4f11e4841707765623e14effedbb088b8d54583