Malicious PDF — malware analysis report

Static analysis result for SHA-256 694e66e79273b651…

MALICIOUS

PDF

90.9 KB Created: 2021-05-31 09:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7d42901266575d5ad67c396dadfcd638 SHA-1: d6aed4d8ca9e3681450b84513da4f4efc092b55a SHA-256: 694e66e79273b6515926560ddd9cc407ba68b553e3e2b825aeb1dead50d9d455
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains references to 'Attila total war terminus mod', likely a lure to attract users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://bologen.ru/123?utm_term=attila+total+war+terminus+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443815/normal_604b4b56a12bc.pdfIn PDF document text
    • https://siteketu.weebly.com/uploads/1/3/4/3/134362374/fusumug.pdfIn PDF document text
    • https://didipovewefof.weebly.com/uploads/1/3/4/3/134306756/d1776eed57bcaec.pdfIn PDF document text
    • https://tebumozokafu.weebly.com/uploads/1/3/4/4/134471783/04eba749e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481828/normal_6017680fb96f7.pdfIn PDF document text
    • https://ziwirekow.weebly.com/uploads/1/3/4/5/134529616/gunoxeropadoge-leposinubaver-zosunibegux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469834/normal_601dd645e5ca9.pdfIn PDF document text
    • https://gebomatera.weebly.com/uploads/1/3/5/3/135396668/riviwimujiso_varin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446765/normal_602f38b03cc2d.pdfIn PDF document text
    • https://vadugoza.weebly.com/uploads/1/3/4/5/134599956/9744712d18e576.pdfIn PDF document text
    • https://zajenutomu.weebly.com/uploads/1/3/4/1/134109216/puxadutawabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479905/normal_606bf5a596b08.pdfIn PDF document text
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/ripepep.pdfIn PDF document text
    • https://kepuwizetel.weebly.com/uploads/1/3/5/3/135304134/1612184.pdfIn PDF document text
    • https://xanilavobug.weebly.com/uploads/1/3/5/9/135959945/wivalabu_bebezasavoj_dokukos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486354/normal_6061b0b8bb29c.pdfIn PDF document text
    • https://nukawidizuzaxep.weebly.com/uploads/1/3/3/9/133997642/1416534.pdfIn PDF document text
    • https://xafarigokexugu.weebly.com/uploads/1/3/6/0/136053206/lowiwusukujadig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420766/normal_5fd77c06f1e1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418968/normal_6030ad36a4ac8.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/8bc00684-cbbe-436f-9d6f-1249c05cfde0/crossy_road_codes_for_coins_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80c60786-a045-4c98-854d-97c9258a65b7/2015_maserati_granturismo_mc_centennial_edition_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/069f5e78-e705-4ede-939f-cf9e2d404acd/jixububiwisum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd43da1f-a330-49eb-a067-3f2a84c68cfa/etapas_del_proceso_de_investigacion_cientifica_aplicado_a_la_psicologia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc3febb-cf83-4765-9336-6e82964c4b36/fodidufexonobidunosamipa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EF 5052 bytes
SHA-256: 6da52063ced1fe25d5995e69dc3e241117818087b4944ac9af410c191b7ac1f4
font_01_sfnt_off00011216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11216 17340 bytes
SHA-256: 4cd5846d3959da0d1b48d97f08c410c31e9cd4504d072e2264978b3d9c5c4c6b
font_02_sfnt_off0001460a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1460A 16188 bytes
SHA-256: 378c2038be5304ec6ae474a773c6d64451c102a5a19f03389203aa8c149dd253

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