Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc0dd35076292fd…

MALICIOUS

PDF

69.5 KB Created: 2021-10-03 05:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6c1bcefa0bc1886484ab7ac226b8055e SHA-1: e61f845ee7cda253f686e291289b7c0b13f8e324 SHA-256: 0fc0dd35076292fd78a4ee892100134a9d6b8d914ea4d995e6716f38a805fa6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The embedded URLs and link farm heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://oniceh.ru/uplcv?utm_term=testing+commissioning+operation+and+maintenance+of+electrical+equipments+pdf PDF link annotation
    • https://mimpi1pusat.com/contents/files/fugoz.pdfIn PDF document text
    • https://gcs.kz/data/content/file/65625671907.pdfIn PDF document text
    • http://primaria-ciocirlia.ro/media/file/12536074737.pdfIn PDF document text
    • http://yves-segers.be/userfiles/files/51597016969.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/j2r5jh7l8kpjjahkmmtc0fhrg7/vogijejoviw.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/76361604730.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/27178569991.pdfIn PDF document text
    • https://pomtco.com/technical/files/file/98449990925.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/3675089212.pdfIn PDF document text
    • http://contactfm.be/userfiles/files/33480334829.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161349c194b40d---49402731838.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614fde56ec165---72623562061.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/rotisizebarepo.pdfIn PDF document text
    • http://stattus.com/assets/file/66274886857.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/patukirofomofozegelumiro.pdfIn PDF document text
    • http://i-physiology.ru/upload/lukinanetetegefaxevoxo.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/bezewune.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/laworaxezipokabe.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/e5ca15ef650a33bcdbb3117e5245e4ed/gilelegupanojeloki.pdfIn PDF document text
    • https://afmiletisim.afmiletisimajansi.info/resimler/files/48001204273.pdfIn PDF document text
    • http://soundspace.eu/Upload/file/rilidorijijatuzaduv.pdfIn PDF document text
    • https://ctcitsupport.com/media/files/67147955907.pdfIn PDF document text
    • https://filetorme.com/upload/files/42059373583.pdfIn PDF document text
    • https://franciscovalles.comtraining.cl/userfiles/files/bubibesosug.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/e0727abea1422a04568be1c6f99af14a/bexozudijadapujedo.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_off0000b115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB115 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC927 14804 bytes
SHA-256: 186236af14147f9a30a20628053b036b0d3709491888157fe95b76d2437ad2d4
font_02_sfnt_off0000ede0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE0 11172 bytes
SHA-256: a0bf2e396657c43b8fc221cc39cceef12071d9b6e22582a97c09c2b4da54a2af