Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9b06243327689f4…

MALICIOUS

PDF

83.1 KB Created: 2021-07-17 02:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a6085cef6656c9e706d25300a1826c08 SHA-1: 48d3c7927bf064be1e180c759de3ea41b37b1430 SHA-256: f9b06243327689f429f5e8e93c0253721323873dc7d2788886d8db56b17e89ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/271ae6bd8bf26e7468c2d4104e68a603/bitefedagixifafezilebon.pdf In PDF document text
    • http://liffeyartefacts.com/fckimagefile/file/xilixivabovo.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/09f4012c411a878f5bf052ad43ad81cb/31664236257.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93af79d172---sewepunuxojuwibosezone.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/62709461226.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/f88535707b65326fdb09fc3bbde7dca0/43623806053.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/40624929951.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/6303288361.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d6270406b---39407688951.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087bb63d571d---metoruvekasezuxizufafaze.pdfIn PDF document text
    • https://serpavenger.com/ckfinder/userfiles/files/57710355820.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///waboz.pdfIn PDF document text
    • https://hansenlight.com/UploadFile/files/nidemuv.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5bb83d415---96392372972.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/bezudatunukex.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.com/upload/files/bokegozimalisasur.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/51636784839.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072815fab68f---jozewavogipe.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbb4171e06---zewoxumepa.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/cf24f7f95f7f5b25f4c95739b24701e7/xewoloxawolitasimo.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/vexopuzafiluzofusivomaj.pdfIn PDF document text
    • http://toastwarenhuis.nl/app/webroot/files/userfiles/files/31438209599.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210614094613_paxdo6.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/b44e99t4ep75n1gj4gq13f7qeo/podafulabalubuzewujap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=settlement+patterns+examplesPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB83 10376 bytes
SHA-256: 43291926641d189c45dc0de1ea8e63315aaa177af7cc68fa29918c948fbe0e16
font_02_sfnt_off000112f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F6 16928 bytes
SHA-256: de9b47dd3de76703ca8637b177b767aadbb33f7a8f2e8b4ab1964f5bc123fc93

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