Malicious PDF — malware analysis report

Static analysis result for SHA-256 65025f91eb2d04fb…

MALICIOUS

PDF

78.6 KB Created: 2021-07-30 12:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f1e5e3179bd988dc1039d7aa678be250 SHA-1: ba537c19cb35ab2587bd6f44e3ab8b6847043862 SHA-256: 65025f91eb2d04fb96dd382aabb46bad4f359b3b74c75553cfc6beed6221688e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It contains a link farm pointing to numerous disposable hosting domains, a common tactic for distributing malicious content or conducting phishing campaigns. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://xn--hjrnskadeakademien-mtb.se/userfiles/file/zaxabigutezed.pdf
    • https://presstone.hu/userfiles/file/janekixilow.pdf
    • http://svatba-emi.com/uploads/pages/files/mujigibibipamez.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/5stkp7npnjdou8p90ib3amu5kn/52077631671.pdf
    • https://okinawa4d.com/contents//files/4883633224.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/da82ec74ca755cb176b86202e3acf651/milogitelajojalidadesaza.pdf
    • http://piau-po21inn.com/CKEdit/upload/files/44008127909.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b243de377---ruxewusolas.pdf
    • https://genegurumiraclehealer.com/userfiles/file/64983917857.pdf
    • http://lg-palette.com/upload/files/kiladodikotifon.pdf
    • http://bijverhoeven.nl/uploads/files/78987230881.pdf
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/rogixaturigebamek.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/7670b35fcd27bf8fdc5bc9892ad9a005/41801111241.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8d6291bf95---domosilulilo.pdf
    • https://chp-travel.ir/data/file/5442957634.pdf
    • http://aiskreunion.com/clients/b/b4/b417c2091670ce0b0d78f4b231aea02c/File/30312852184.pdf
    • http://sys-svinding.dk/userfiles/file/duxamora.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/ab7bccf37d04f11015ff86417d9f2afe/fopasukupek.pdf
    • http://emotionpicturesfestival.gr/userfiles/file/93537067912.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/82654987ddca9f06763887c359eb864d/tokadowoxunomakader.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16074b8200137a---didex.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160708027ee2f7---wadororinukaxis.pdf
    • https://burgas-remonti.com/userfiles/file/zavukomekareregepatamijej.pdf
    • http://gsprojekt.eu/userfiles/files/vivofiwonuvut.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1609d1fcb---bilozedakawo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=%D0%BD%D0%B5+%D1%83%D1%81%D1%82%D0%B0%D0%BD%D0%B0%D0%B2%D0%BB%D0%B8%D0%B2%D0%B0%D0%B5%D1%82%D1%81%D1%8F+word+2007+%D0%BD%D0%B0+windows+7
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c325.bin
30d1e821be1641677299e0ac94043153b36e8579f34e517ce9ef9e3a5ea33d9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC325 11308 bytes
font_01_sfnt_off0000ddd6.bin
b25729faf68c153908accbe1508c2c27cb8162565872ebb33703f651b6a52768
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD6 20672 bytes
font_02_sfnt_off00011128.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11128 16792 bytes