Malicious PDF — malware analysis report

Static analysis result for SHA-256 092a0e9ac49d6f16…

MALICIOUS

PDF

98.9 KB Created: 2021-09-01 08:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 81f4b2c0b1b8154ffe6d7f469417dd95 SHA-1: 417fe851d2a2be9370e9d67baa37aaa8c1dff1e0 SHA-256: 092a0e9ac49d6f16f4103038fa1cc9ae233fa4971dc647b2ff706d037306a87e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the presence of embedded URLs.

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://laborke.ru/uplcv?utm_term=lord+shiva+images+lingam PDF link annotation
    • http://southfieldhigh.com/clients/a/a2/a202dccd336a30abee2d0a4364b9f07c/File/48951909839.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/dikade.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/f9982bcd98e15c7192539ea0a6fd7a4f/kebatevadimemafolaz.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/24721f1f4409e1d59b65f6fb3db208a6/87908099446.pdfIn PDF document text
    • https://ottopianos.nl/files/sejazatadareritalixafa.pdfIn PDF document text
    • http://vtaky.sk/media/file/vawarowufadanubapube.pdfIn PDF document text
    • http://onestep-tokyo.com/userfiles/file/ritame.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7d542118f---13628635678.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79a13c82f5---33854926395.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/73461055995.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/87b9539f3d40897975838cb574c61ceb/pasenibokogovu.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072e429dd475---bixanesozanafex.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/n0jl2k25qh3u8tobdpnvirudhe/fomidejufunejujudetoko.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775f9bc90f6---dedapupulapiduzipadufamud.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/49892010543.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/53510429528.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e3c6fbc4fe0---78332587859.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/krbmq8d0log9n73r6t17lid5io/88689979949.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/16849303790.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/40535256423.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/45302638257.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/32409865501.pdfIn PDF document text
    • http://suacona.com/clients/16856/File/24832503203.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_off00011da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA2 18272 bytes
SHA-256: ab229abee80b14d5b5f96abd55be85958dace241632f69a9f96d5d5162009fb3
font_01_sfnt_off00014cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CDA 10620 bytes
SHA-256: 3e9696465ffab13f59e2018fb7650c144be5d5ebca64f79e938851fedb212325
font_02_sfnt_off000164b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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