Malicious PDF — malware analysis report

Static analysis result for SHA-256 565303287090edc9…

MALICIOUS

PDF

90.8 KB Created: 2021-05-17 07:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: beebcf0a206333f3aa8d50c24219b630 SHA-1: c6760aa1329beb3d64958ea5681bf29e91ac0f78 SHA-256: 565303287090edc92ac7343bdcda27044bacc4293f33eb15717f29bbb6b2e54c
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 0.9912

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://soxebez.ru/strik?utm_term=what+chemical+smells+like+maple+syrup PDF link annotation
    • https://zolaverapudo.weebly.com/uploads/1/3/0/8/130874102/tekefiwutonatamox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453334/normal_5fc7a75662bd8.pdfIn PDF document text
    • http://padojobimo.mywebcommunity.org/29065184853.pdfIn PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/ledibivun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476432/normal_6063aefdbc3e6.pdfIn PDF document text
    • https://kekoluborefox.weebly.com/uploads/1/3/5/3/135327445/gulomapaseso.pdfIn PDF document text
    • http://dakekunagefasak.sportsontheweb.net/xetewumajanawudeji.pdfIn PDF document text
    • https://nituzizuzij.weebly.com/uploads/1/3/6/0/136091047/vozigovuwunogi-marar-gumuzedo.pdfIn PDF document text
    • https://lukimozogu.weebly.com/uploads/1/3/4/6/134638062/loxusup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498645/normal_606839a1a3fd4.pdfIn PDF document text
    • http://yognat.space/regim_alimentar_diabetb00v7.pdfIn PDF document text
    • https://zegosonov.weebly.com/uploads/1/3/4/1/134109065/1c97421685126.pdfIn PDF document text
    • https://gofuzuxelizexo.weebly.com/uploads/1/3/5/3/135391542/6414966.pdfIn PDF document text
    • http://marketeuro.pro/mozatobolauz6nu.pdfIn PDF document text
    • http://jebonefawudo.sportsontheweb.net/66359422282.pdfIn PDF document text
    • https://losanuritajog.weebly.com/uploads/1/3/4/7/134730792/b53582e795f08.pdfIn PDF document text
    • https://fogorito.weebly.com/uploads/1/3/5/3/135322632/28e263f1db21623.pdfIn PDF document text
    • http://tryraisins.club/wejemazla6g.pdfIn PDF document text
    • https://mitixomog.weebly.com/uploads/1/3/4/8/134859124/boduma_josixabetador_dopil_luvapaluwafafep.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://susabumo.atwebpages.com/what_is_meant_for_you_will_find_you_quotes.pdfIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_47ab6bb5f0de4ea5ad53172212a7419b.pdf?index=trueIn PDF document text
    • http://mujebik.atwebpages.com/excel_data_validation_formula.pdfIn PDF document text
    • https://a6132035-7465-4fe4-be4e-2faa96c22dab.filesusr.com/ugd/cf950b_f84be77ad1bf4008992cf505e9c4f911.pdf?index=trueIn PDF document text
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_afb896657eda400a88a8f0b612bd38ef.pdf?index=trueIn PDF document text
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_b829a181622840eb9c32e48caa48a85d.pdf?index=trueIn PDF document text
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_f544916ef72b48828b34fa8c1de79db6.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF116 5144 bytes
SHA-256: 810da4abcfc8663616da6fbf9b280ebc17617d1c29436fddb9df5e000179c5bf
font_01_sfnt_off00010320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10320 5016 bytes
SHA-256: 30a96805cb944d164d6aebe4dab40323cebc9c80bcd1ac3994340d745c233090
font_02_sfnt_off0001143f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143F 10720 bytes
SHA-256: 1ca3b4fcfd772bcefca1bb74dcaded586adbf339401236cebffb3050081bd2bd
font_03_sfnt_off00013928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13928 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449
font_04_sfnt_off00014e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E57 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3