Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec1b07b17d8c6c3e…

MALICIOUS

PDF

86.2 KB Created: 2021-07-02 01:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 68ad36e1019b79744a16dfb8f0189a06 SHA-1: 071b7996d71686925fba670e3ba750a3b1010758 SHA-256: ec1b07b17d8c6c3eb5f6281a87a0c077c4dbffc864bbc053aadaf7f51b8f892b
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, hosting numerous links on potentially compromised or disposable domains. These links likely lead to further malicious content or phishing pages, aiming to deceive the user into clicking them.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://x-software.cz/data/file/79043556032.pdf In PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/4048e9a57f68226e916f618934031ae6/nuxometatirus.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/kn2up7e84s109221lq0jqkhs05/34763901355.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/71850338530.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6d025d1d2---25301914453.pdfIn PDF document text
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/pavowozamonijipuja.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/bokedipaxekabefive.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607428462cf7e---wegavovitavexagopuvifuwak.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160be6eff6a4f9---gepusesijalovijuxewu.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/19932539238.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/80516925547.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c43c74a0ce5---kimofawapuda.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082826aed635---46191262595.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/pewipugamuxu.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/0665a65e2dda7b115f691112169ae74b/64288248437.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099feff21d4e---29841368114.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b734c29a185---18249696051.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160779eed95dae---regafederamorumevovole.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160840535e2547---deziwugolekutalagonuv.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/zoxapejegizudakivegal.pdfIn PDF document text
    • http://accronline.com/userfiles/file/72474811406.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/kin28n4hqfg608ag9sne5ro32n/81550557567.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/413e63c27e22000a17490cf0ead42336/43799416823.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070704f1b7b5---35131637037.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+angle+subtended+by+an+arc+at+the+centre+is+double+the+angle+subtended+by+it+at+any+point+on+thePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD283 11112 bytes
SHA-256: 02afbc3ffe2237fa403b5d77a0914fb3352eba1bc7c8b2abbf19364e1af8ce06
font_01_sfnt_off0000ebf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF6 16088 bytes
SHA-256: 450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c
font_02_sfnt_off00010127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10127 17512 bytes
SHA-256: a2e2b7bef22c48063e374862964cade39ab4cb28750933685d83d94049125463
font_03_sfnt_off00012f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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