Malicious PDF — malware analysis report

Static analysis result for SHA-256 597ecf1d9865783e…

MALICIOUS

PDF

70.1 KB Created: 2021-10-10 17:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: c0bdfa73e0f9829e3539f956553cdd6e SHA-1: 4988a210e274e1256a4b20c97be244c8f04a0a40 SHA-256: 597ecf1d9865783e11ed4bd5a9324b34ce2374aafe84ebc4fc39cdb53044b1a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=risco+prosys+installation+manual PDF link annotation
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/nogukokodorerimozujipeni.pdfIn PDF document text
    • http://dzerzhinsk.timebank.ru/sites/default/files/photos/pagefile/zovemu.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/gejobosalinulamabafam.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/15578646520.pdfIn PDF document text
    • http://eur-idea.com/userfiles/file/tezemawizemopavibi.pdfIn PDF document text
    • http://xn--80adpfaaeictf0c6c7i.xn--p1ai/public/file/mepubaxaburivaxo.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-9-1/20210901220142106397.pdfIn PDF document text
    • https://combrooncom.com/contents/files/93620243232.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/4k89k1tt8j6uu1alkluj1hqj09/pokadonikodogibor.pdfIn PDF document text
    • https://leganordavigliana.com/uploads/file/zunixewijof.pdfIn PDF document text
    • http://zhuxintrading.com/uploads/ckfinder/files/20211006/16335137536026.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/wazipalog.pdfIn PDF document text
    • https://27061010.com/uploads/files/202109230513421415.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/17609105959.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/47839219763.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/75854202731.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/fifafuzubosagasatininodef.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/9aa3e12c3721c2b07afd15787992220b/79664302270.pdfIn PDF document text
    • http://ketoanantamhcm.com/uploads/files/71381627491.pdfIn PDF document text
    • https://jatransfer.com/userfiles/file/97962845032.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/go9rac83270j7sbashpp5sv877/955146193.pdfIn PDF document text
    • http://gulfcoastlist.com/userfiles/file/22455324073.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/41522495219.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/b7f33461ecb133d96a129f5a583f2b29/47182717725.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/livavalabimugolutamekem.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB671 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE88 10664 bytes
SHA-256: 42fd0fcb0729b8a6a4624e4c8866be82e12bb00b232089d5f8b5d63332dd3963
font_02_sfnt_off0000e6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FA 14300 bytes
SHA-256: b1fa9645544e11c47a991bc84c2500a5c70b3d2e851f5c6482fbea960a44768e

Open this report in the interactive analyzer, or submit your own file for analysis.