Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f288e46839e29ee…

MALICIOUS

PDF

107.0 KB Created: 2021-08-04 05:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d3d1f7c837293d1e3e0fb247ab50c05c SHA-1: 689a8f7f5e184af2d13fc4754907f25bbb560baa SHA-256: 1f288e46839e29eef4205e18cbbbabe6167b44f0dee4731ff80c8fd06dc877a8
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://aweibel.com/Photo/file/89655708335.pdf In PDF document text
    • http://micruts.org/userfiles/file/fotasujikewozofumipuzov.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/52366743623.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/pagusajedosixobef.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/gekekisaralepojob.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/zafinejim.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e621bd949f---21609770760.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef8ae7def0---62540314935.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a86d5c530ff---24663781232.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/97cd123fa4d64cc1fc732e0f7db68fe3/pitemuxukewuzuta.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/55633308821.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/xeravajupiwoxem.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/aecb36bf52244d2c9f9fb00323253161/losevowevusufivubabiru.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762944285f6---38031285861.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/rexizokizixovupinexagu.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3240ce30d---velimujiweker.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/754a6b2e5c0786d8a19b1dbdd713cc39/55303564035.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/d41f86fb53ca4cb3f872ab83943ca4e4/wokozabunabo.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/12666627576.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/c3ph4nmp972b7e5e236aibatc3/bugadibitepibulezijiniwo.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/97774398125.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/043d7bea30a489cc2e010feec1c4cac2/72076997785.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/xoxavod.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/29997492418.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a7943311c8a---rutagepafuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=crash+bandicoot+rom+download+gbaPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13755 10944 bytes
SHA-256: b874db3dfe2023c248bc18f63770ab6b50fa812ac6256bbb50600e35f6eb2d79
font_01_sfnt_off00015054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15054 20724 bytes
SHA-256: a1ecdce830a51ef49aa015c7e36c2b6af3ba59654485e4d5023f2e4a2effb705
font_02_sfnt_off00018405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18405 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1