Malicious PDF — malware analysis report

Static analysis result for SHA-256 9281cbfb63db8357…

MALICIOUS

PDF

76.7 KB Created: 2021-07-02 21:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3ecd760c196cfbdfaddb2ed1ae0944c0 SHA-1: 1bbb992cdf0548f271021fa271e8ebd89afecdab SHA-256: 9281cbfb63db8357e2c4ca8a5b8118c0eb4722995334f09ecc7aed4c5cda502a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, but the presence of numerous external URIs and the high confidence verdict indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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=factors+of+8+and+20 PDF link annotation
    • http://razaviota.ir/basefile/razaviotair/files/xekoraxozexo.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081fcac9ed3c---16896934493.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075038c45a22---69679582689.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/41e7b360058b43f2169445005b57d47f/98734229678.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/26691651383.pdfIn PDF document text
    • http://run2endalz.org/clients/2/2b/2b4973775a35d8819257a28a16fdea67/File/82590631942.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/jn8rmq3rp1c7k1q8akboir9cf3/60595178096.pdfIn PDF document text
    • http://valeneighbors.com/userimages/11114543882.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/kalinazuto.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/44467812208.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/fojovazosepetidininidazu.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/repogomofi.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba32f494fb---gipabesozozufiwas.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/33b1e2677afc6639f9e52711e9709b47/lomozagaxinetulonigo.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/f780f0ef64f8f41af08d5b7177a6a410/44796188837.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/360a771ed9b334402d202df5ac2a8c63/norobulavaful.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/95498702827.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/gizumusipanetuduzebuk.pdfIn PDF document text
    • http://taitung-house.com/CKEdit/upload/files/67410370263.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc089744eb---90819342652.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/b618b96d9b43e672800ab0968f88b533/fafagazexozipoxowudije.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160860e5f37260---96746781405.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/9e08e5e4a3e76cdb7f9a66ce207b21d3/76032670945.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/konosel.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/mejotesalumixexiw.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_off0000c902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC902 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE119 10624 bytes
SHA-256: ada04d0b1d3f2ff38dd30e56bd3d885833a7229577287e6f108335937e8fcbc5
font_02_sfnt_off0000f998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF998 16892 bytes
SHA-256: 6136d97caa40e1d145ce37bedcf22c872a65700fc91b3a522555c108fd9d53be

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