Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c45fe451f310077…

MALICIOUS

PDF

81.5 KB Created: 2021-02-12 13:20:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1629029222fbfbfc6afa332a767789ba SHA-1: c46a9eed3cf47ec2f18c63ce616c966502b1457b SHA-256: 0c45fe451f310077bdbb5a68a67fa14f1bb2abb465f00dbc5f91483401d7573f
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 0.9990

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://leonvi.ru/wix?keyword=vault+asset+management+guide+pdf PDF link annotation
    • https://cdn.sqhk.co/rekewuneboxu/SjIiacO/25991529838.pdfIn PDF document text
    • https://rixukiwifezi.weebly.com/uploads/1/3/5/3/135392959/f990d7f222799f.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/hbicgcy/97953784941.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/0Kijieo/dojagilum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_6016e36b955c7.pdfIn PDF document text
    • https://roxuvipiga.weebly.com/uploads/1/3/4/6/134637137/cdf25.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/GlidnKE/drawing_board_definition_idiom.pdfIn PDF document text
    • https://pixerogamaba.weebly.com/uploads/1/3/1/8/131871590/nusobimakulasog_devolenuder_mewagabotinigup_belogelow.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/Dif8gd5/75794266264.pdfIn PDF document text
    • https://pegojuzifaxoda.weebly.com/uploads/1/3/5/3/135309499/8165623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477162/normal_601551feb4453.pdfIn PDF document text
    • https://lipemegovaw.weebly.com/uploads/1/3/4/7/134766771/6643667.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/hhH0Tha/kits_de_chelsea_2020_para_dream_league_soccer.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/7idw9ia/jetugewubuvamip.pdfIn PDF document text
    • https://birivisixakaxe.weebly.com/uploads/1/3/4/6/134608058/tanexukisomovi-pefavonu-bejuzisased-xutemakego.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5fe2b1f531eec.pdfIn PDF document text
    • https://fipamowusaki.weebly.com/uploads/1/3/4/8/134879766/winovogabaxil-zisapajek-rafidasojo-jeraz.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/ggijjii/79131456150.pdfIn PDF document text
    • https://nivawapononagi.weebly.com/uploads/1/3/4/2/134234681/2c40d5108b88f5.pdfIn PDF document text
    • https://vadopesi.weebly.com/uploads/1/3/0/7/130738994/a012617632d6f.pdfIn PDF document text
    • https://nelixifejesuvol.weebly.com/uploads/1/3/1/4/131406681/b88ad3d7837724.pdfIn PDF document text
    • https://cdn.sqhk.co/sowojusawepu/APS7Rhi/97172550323.pdfIn PDF document text
    • https://gaxasexafarud.weebly.com/uploads/1/3/4/5/134590452/6786414.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/SSjsidM/fotevata.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF243 5004 bytes
SHA-256: dc9dd3a0f9740e2af2637dba52d2ef79297570078e3121021dc4c34826931606
font_01_sfnt_off00010339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10339 11296 bytes
SHA-256: 54f35bf1eefaf25b8cbec358d61505d0d4a5ae40b359bb459bc3ed6b2be846ba
font_02_sfnt_off000129ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129CE 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230