Malicious PDF — malware analysis report

Static analysis result for SHA-256 24a3070108553ec2…

MALICIOUS

PDF

86.1 KB Created: 2021-09-02 08:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: def4ff6c2d575d6e7723dd5ee4507268 SHA-1: 28703f4d3c3142e55a1bb9d96f35df5525898ac3 SHA-256: 24a3070108553ec233160af11964f69928e666ed870ff09d3e10097e767b874d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient to infer a malicious link-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://chcial.ru/uplcv?utm_term=terence+crawford+canelo PDF link annotation
    • http://hak-al.com/resimler/files/kawuwexipo.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/36815123319.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/wisupubepeniz.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/newafej.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/89041620437.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e38f9929395---luzanetefipidipabo.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/zexoxarif.pdfIn PDF document text
    • https://conviviodihera.it/dati/upload/file/54175472718.pdfIn PDF document text
    • http://badgerhillfarm.uk/xidenejef.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/36294894305.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/dipupenategewogigefemow.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/62471744160fc63ac7f8bc.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/1b3df1343a942be729baf04655f3cd1b/sowukedalo.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f2900defcb7---zemebazutevedeg.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/6l7rg517ggjll2c56qf7hc2d7d/tiwemodagatewigegoregeb.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/8960a404704596319d1212093e41e884/wavarivezavi.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/99588901009.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df3d6a6e303---61605986327.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/ff5f0cfd2d34481e0cbb820da1270c31/49515139360.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/pinigowazatu.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/genojor.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/a7cf9217b7d31933af04c6d928dc7b9f/lojadajevojapido.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/96d5b1434e6d9f46a1694ead9a297f51/semilivakaxupitererat.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://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_off0000eab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CE 10160 bytes
SHA-256: 3ec43a3d29a611d0389b8eb23429e186f8da4e5bf9cea722e84255989d353ac3
font_02_sfnt_off000119b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B3 18756 bytes
SHA-256: 2b0999f9c2e49a6d2f2da2a9898a3478349bde2a0085ae1f3520fbdac08da11f

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