Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0568b919f6bdaa…

MALICIOUS

PDF

76.0 KB Created: 2021-09-03 16:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5f7a39448817d3914b423e6f714869a7 SHA-1: 296ea3644469dac09da0a1f6ca6abeb6eeab5787 SHA-256: 8c0568b919f6bdaadf85fcd4be9b48c0ee8025a9ccf2937743b5a1edb67481da
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm. The presence of 'cmdjqd405rqdeifu30t0pr/21883880421.pdf' within the document text, alongside references to command execution, indicates a potential attempt to exploit vulnerabilities or trick users into downloading further malicious content. The primary goal appears to be directing users to malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://coretry.ru/uplcv?utm_term=scag+freedom+z+52+owners+manual PDF link annotation
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/mfvncmdjqd405rqdeifu30t0pr/21883880421.pdfIn PDF document text
    • http://hoangminhphatkorea.com/webroot/img/files/nuwugijobosapozoxod.pdfIn PDF document text
    • http://hoctienganh123.net/upload/files/kenibepipupovaguwakuvemi.pdfIn macro / runtime command snippet
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/d7731e2d6e25477c0766a237a1d4a0cd/paboludiwo.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/xoxovipanukidumedaxem.pdfIn PDF document text
    • https://tour-paris-guide.com/cite_imgs/file/werofogegojifikukezifut.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adff346aac3---wovalofidoxupoxofibetuva.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0e925e800---kukidimibibaxinivek.pdfIn PDF document text
    • http://sxcec.org/userfiles/file/99053298588.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f867af71c12---naxodifabebujumidamum.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/65152683913.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e6bd461f682---81790058489.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/jipitipalamurarosagifeb.pdfIn PDF document text
    • http://cecev.com/stockages/files/jedirex.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/39143063051.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/92549782725.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c47a9daabdb---ravogepexuzefixederimefe.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607060ad73c41---16039879267.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/1625071488dugemu.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6a91d2050---85406859709.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/bewonametijuvizilab.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/xoniwoxorur.pdfIn PDF document text
    • http://texmet.pl/userimages/file/76669845032.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/6lv7hkgd6pac4vjeci7pf0t3ds/piwinemitiwewasixukazajow.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/0f1963ddcd7617ab70cf4a6f5608097e/87937405013.pdfIn PDF document text
    • http://hoangminhphatkIn macro / runtime command snippet
    • 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://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_off0000c191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC191 11204 bytes
SHA-256: 833c5343b37a5f2cb4fa38b51d4d4801940725c4a9e6b22983a38958e7360ef2
font_01_sfnt_off0000dbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E0 17300 bytes
SHA-256: ad2955a9a4c5e26eb350a003f9370398dd801fba955030ec5dc9af174004eb2e

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