Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd14328435afd5ab…

MALICIOUS

PDF

87.6 KB Created: 2021-07-20 11:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e28fe04054301179eaf95c195477ed66 SHA-1: 019e34a8706617d5c528cc9ab5e36949f82786b3 SHA-256: dd14328435afd5ab66d200cfefe9087896f7559ee3c21be322d888c4a17b8ad9
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm, with many distinct hosts and links pointing to disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The presence of numerous unknown URLs suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://pnmanagementsolutions.in/uploads/31277917446.pdf In PDF document text
    • http://salonorganica.ru/upload/files/9975592677.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/sesagu.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/ribezololufomegizonawa.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/levinobagemudoxekara.pdfIn PDF document text
    • http://shelton1961.com/clients/35589/File/vumuzewodukizix.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb861ac943---78706225650.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3787d8da04---rupafoj.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/xenakedon.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/79167704534.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/76512463013.pdfIn PDF document text
    • https://kham.vn/userfiles/file/lasilopupofulosuvinupozeb.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/jusebamun.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/xaramatumumovu.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791e16e1124---balizolij.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/d45795173d11034798fb59d5867d42d8/gupejojawuzesizuj.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609af276d5d8b---nikaxugipeg.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/da55d19666b24ddfd801066a8065eafe/68587286899.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/9f73529452acff32f64863695ec81540/fovoju.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1607edc5151731---50595151643.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6fefcd843---53063306338.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160995f36c4c7c---25431344383.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e27693b9b65---18327699596.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0ca85e156---57305818551.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=speech+genres+and+other+late+essays+pdfPDF 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_off0000f48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48E 16472 bytes
SHA-256: 0803d7e4f68d7bd937b0972c2b7aea841389293038bc1a4aad66b0558b175fa9
font_01_sfnt_off00011f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F42 10996 bytes
SHA-256: 87dd07a9bb2b4c4c47628c0f816e34c2b49c25641e1b618ccc57e064cab468ac
font_02_sfnt_off00013897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13897 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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