Malicious PDF — malware analysis report

Static analysis result for SHA-256 4de32a89bfc5f146…

MALICIOUS

PDF

80.0 KB Created: 2021-06-27 10:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e3a89f2322813c7f9abb092dfd470642 SHA-1: cfdb9502a59a5f2208debff5dd41fc5d1c162325 SHA-256: 4de32a89bfc5f14678d834ffabec4056d26ea0b1fc4d57385c4004aa0c6fc168
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting, likely intended to redirect users to malicious content. The presence of external URIs and the overall structure suggest an attempt to lure users into clicking links that could lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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=demonstrative+pronouns+for+kids PDF link annotation
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d5121f769e6---71465733621.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/gurinuwalerosunutovebegi.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/92758544367.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb5d2d5354---9848602643.pdfIn PDF document text
    • http://pbsdeltarho50events.org/clients/d/dc/dc3fcb918f61c9276c5829b035df2abc/File/3128841512.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9f8edb38e---57556335433.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbd2fb633c---30188954756.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/paxutulipejixikugalubi.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ce87c5758---38826977105.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/pq3qe9rff6tc6mcp6368m6b3u3/kamawodisozutuso.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5889d16ef5---zupefojibak.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/7a03cf6fc99ddb263f9363192e6e9386/womapitupagud.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16090f11155c5a---fokegijerugawokukibiruku.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/getugesadasusisu.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e65f86775b---26825486682.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608453fccb7ca---59515228797.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/0b084c7b1ea30854fd20f667292e5ff8/11998650051.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/kibotetatexibikofevis.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/tepunekadum.pdfIn PDF document text
    • http://xn--aknmedikal-yub.com/uploads/file/lofipexasegoviborigaf.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087366686be0---13610264814.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aac14f9309b---47839102855.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099841c9af99---dorolap.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/sutidagimi.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_off0000d658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD658 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6F 10872 bytes
SHA-256: da10b65ccc292719ef4cb92c8ad03e7b4a1a4e06fa8ae8e8b2b0a087de69f724
font_02_sfnt_off00010793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10793 16724 bytes
SHA-256: baef261e7f42bc6a44b4fe903b2b243a6592b4e6a6f7b9a89955c000bbf346ab

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