Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ee2b0d14b12c38…

MALICIOUS

PDF

91.0 KB Created: 2021-07-01 18:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9058094ca413bcc013fd906136536d6d SHA-1: 3a6b35bf809ae41dee99a03b09168b323dddeb6b SHA-256: 58ee2b0d14b12c389300d3d4f3c6c01b5e11973f6e8e8deda57a95536cd2e588
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress upload locations and other disposable hosting domains. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://crysiq.ru/uplcv?utm_term=calligraphy+with+mildliners PDF link annotation
    • http://blackivy.pl/userfiles/file/zarumawutijemipog.pdfIn PDF document text
    • http://kalikraft.com/images/file/rafadagudavomibeba.pdfIn PDF document text
    • http://adveotec.com/img/file/kerelebasuxelo.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/64bc162b0916ffe87430dd79865bb4aa/nijugekuwotukopaxi.pdfIn PDF document text
    • https://tepihtrava.rs//files/kozagotolopetideke.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/tilow.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/nolitobalofunisi.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/n3pk1ht3v35dta9fedfb2sp3r1/22671866590.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/m1pkorv1futdg0j385o7vrb8cg/mozumopasadareva.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/9d1387d596375cd14d4fcc989328b750/tujezesozuzunola.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/ed61ab5a7d11a8c53306ab68193dd8ff/xewoduluge.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b62eae5928d---25814676606.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cac7ecb739e---62717713599.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/oabg20vn50s2om6tl02t2tnkoq/62109422517.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/gksp89937anstadkvl6t2jc6dj/25342476090.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609efef750869---7995174147.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/74667789222.pdfIn PDF document text
    • http://thedreaminitiative.org/Content/Admin/uploads/files/34206152944.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b0440ddb2---bodatixebiwunofabara.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/xisuvisoxe.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/96295655455.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/c91e0bb435024bec80241232f12cc009/89857216097.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17a920d8ed---49492781664.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 10952 bytes
SHA-256: 81075ab0f4830b4ffbd52f13a81f8b5227a6b7e3670239d3a22a8c7e17cbc402
font_01_sfnt_off00010e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12653 1680 bytes
SHA-256: 0b27872ee3387f632ffa0f51774877cbc2e0916f916e7d27972742c12f61baa7
font_03_sfnt_off00012e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E46 18504 bytes
SHA-256: cb93b496ea5a402c59e6527273eec2750ee75f9917e667ad034b8cfab7a34ade

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