Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af84fa89956d7ec…

MALICIOUS

PDF

73.7 KB Created: 2021-09-02 02:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: dbcbe121a6dbc2d9e90ea8578bda6fe1 SHA-1: 19e9678f6cc03b0b0b35dbb37af060bbd85ee60d SHA-256: 1af84fa89956d7ecbe6a11b7038c1ed2997dd21e03a091431c847ad740fece1a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with several URLs pointing to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The document's structure and embedded URLs strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/7b14b02dc14afcb0f852be1e6e9fe712/xidelitorakezuneruko.pdf In PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/febixigipizuvifawe.pdfIn PDF document text
    • http://ccsl.asia/files/mojunow.pdfIn PDF document text
    • http://kooijobs.in/ckfinder/userfiles/files/sebagevekariv.pdfIn PDF document text
    • http://siltherm.com/ckfinder/userfiles/files/dofupizadopupopazu.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607caf8f9cceb---72667294681.pdfIn PDF document text
    • https://agrando.cz/files/file/71608968474.pdfIn PDF document text
    • https://vontobel.shopbyeberli.ch/userfiles/files/famevololarapajurufal.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/543669ebe3cce62610822107b1202d58/jomuwusazeboxujotisol.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/0b567475e6b3cea74b6ec2a6cd3d895d/lomepivozakoxoseligavete.pdfIn PDF document text
    • http://lordbeaverbrook1973.com/clients/76835/File/penakupevojanurogedo.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/77826982716.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/87619781055.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/wukabuxid.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846c5f076c5---57727523106.pdfIn PDF document text
    • https://akconta.com/uploads/files/22736185717.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/xubup.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a49b85df794---67919758047.pdfIn PDF document text
    • http://montgomery71.com/clients/34132/File/jipameligovexut.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/81944559578.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/37019127208.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/13bb09ac116bcd21befdabd462d96c47/judevolulawawuwejemiwesuk.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/2a2a5dd41c966c153c7b1b71c05f18a0/nezes.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/8964843153.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/64129255435.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16074c064de67e---92491465223.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2dbe83777---76644790895.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=sight+word+therePDF 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_off0000c0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AF 16144 bytes
SHA-256: 064afd089150fafd3cb3d403da482d3c391f2c8239958ccaeac5e77c95728345
font_01_sfnt_off0000e9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10200 10208 bytes
SHA-256: ef41bd5b0f411936ae11709e49c50a4540a5d9378891c0648c0653c010546b30

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