Malicious PDF — malware analysis report

Static analysis result for SHA-256 901ceb53da89ca9b…

MALICIOUS

PDF

74.2 KB Created: 2021-09-19 04:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 87121d0876191b6c3afdf087f19780f3 SHA-1: f32a34858488f7a421806b06a937a47d065f6649 SHA-256: 901ceb53da89ca9b86420ea225d874c5bb742c1e461ff2230e1681922f18e6cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it functions as a link farm pointing to compromised CMS uploads and disposable hosting. The embedded URLs, such as 'https://pixomot.ru/uplcv?utm_term=telugu+movies+free+online+watch+sites', suggest a lure to external, potentially malicious, content. No scripts were extracted, but the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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=telugu+movies+free+online+watch+sites PDF link annotation
    • https://mkontakt.pl/dat/file/fumadowefolimevilaza.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/xeseb.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/dotonotekaja.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/vixofajoninugodiraf.pdfIn PDF document text
    • http://www.painters-restaurant.com/userfiles/file/moxuxawudupakomenimunef.pdfIn PDF document text
    • https://chptravel.ir/data/file/tosuxe.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/fupuzedogibaxurar.pdfIn PDF document text
    • https://ka-base.no/images_content/file/pokek.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/161330914e8eab---60666035262.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/dabiv.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab5e3b7897---mulujet.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/medimofatitajuripukodoji.pdfIn PDF document text
    • http://membranekeyboard.pl/_data/file/81110226071.pdfIn PDF document text
    • https://quangtriasianwindow.com/uploads/image/files/80018629686.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142adf5ac0e5---koronusujakeze.pdfIn PDF document text
    • http://glassick.com/userfiles/file/47431642285.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/mapepemoketevusujezebajab.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/5d9f01d774879dca1d6a798a52342d01/90662692393.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/lagotuko.pdfIn PDF document text
    • http://origo.ws/userfiles/file/gabosubadoxavasexekuso.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/89589475978.pdfIn PDF document text
    • http://allier-genealogie.org/File:/62619370370.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613461b22a855---pitazexotikisepunu.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/161451c33d6fb0---jujejagasaxuzez.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/xegamov.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_off0000c018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC018 16084 bytes
SHA-256: 36674bc19a2dab563ce1f5cdb83ee281a6093975437ef77440b91cf24d663805
font_01_sfnt_off0000e92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10145 11000 bytes
SHA-256: ec031c6cc4e0469f6e231762352134ef7fe3c925bc9aedf39aeb0aa1b39455f7

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