Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a83024314d9d21d…

MALICIOUS

PDF

85.3 KB Created: 2021-09-01 00:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 293a4c13ba2a8028e3f96604169ed807 SHA-1: 5c691236f486d5cc91da0d859fc0a2754c9cfec6 SHA-256: 0a83024314d9d21dd2e12927a8f28c2289cbe392a83c3d1a59b8e8084c11f060
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely serves as a phishing or malware distribution lure. The document contains a link farm pointing to numerous compromised websites, many of which are hosted on WordPress upload directories, suggesting a tactic to obscure the true origin of the malicious content. The primary goal appears to be directing users to these compromised sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1611d0e8f27c04---golazafuketarixu.pdf In PDF document text
    • http://jncs.kr/page_data/file/20210713054250.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/zafixelaxufi.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/99054917557.pdfIn PDF document text
    • https://krono-original.vn/Images_upload/files/95508483137.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/gowuzoribetuzi.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c8e74b33dc0dc78756cfceac14c115d4/ninejo.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1612983e6ec574---2948283527.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/zogoxu.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e6f37b50923---mirijemobotusuz.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52c775a3c0---nepoviri.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/zomebelulutipabudozanaxe.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/72965801752.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5dba9373f3---77090144241.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/f6dq6s3a845s5818amdpe28q4r/befaxuwog.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/57cef7d55ab61357aba1b1ddf32641e8/93056158539.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/momomenopavav.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/bepudu.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/paxedov.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/69bbcc9cf594e1848c36226dddf4a41b/piteb.pdfIn PDF document text
    • https://siroyensao.com/upload/files/83170156158.pdfIn PDF document text
    • https://synersys.fr/contenu/file/39865776033.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da773705702---92811835753.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/76726734808.pdfIn PDF document text
    • https://akvaguru.hu/user/file/fipasadufaviko.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/6980ef4385eb45ea286502eb93f3b9d3/nupulobitexinebetoxoriwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=combine+multiple+pdfs+into+1PDF 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_off0000e978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE978 10720 bytes
SHA-256: 339fe55d7d6e5c333e744b60a61345acb506a1ab447fb6620e8ec4d1d137aff5
font_01_sfnt_off000101e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E0 17648 bytes
SHA-256: 07a13d0a7a7f6bf0465f305f94daaadfaa2f57a04424cbc8adaae6ec6223a932
font_02_sfnt_off00012fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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