Malicious PDF — malware analysis report

Static analysis result for SHA-256 773e356b127c0baa…

MALICIOUS

PDF

90.4 KB Created: 2021-06-27 08:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c23c4bfc81f57ef58e7aa7037f7e1c30 SHA-1: 308c4b3d2715ee5f1bcaa164f979a2600abbfe9b SHA-256: 773e356b127c0baac358429ccfef9f3a60b82fee3b3ef0c36668a5de12ab8289
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised CMS upload locations, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9ca8d6c63---26019192610.pdf In PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/47479b59bfc65066e4c699d20be983b2/43230026711.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/2045d7cb95a1d3f727f3818c1c657519/fedewomubepexe.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/32116135793.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3957b6a9e---98389614363.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/zuxutik.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/ad362dfb5b3780a352622c5a3e151dbb/tufuzolojivur.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5989d4c7fc---75016965198.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/zokugikowizakatorurakeju.pdfIn PDF document text
    • http://tfforming.ru/d/files/92382427688.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/sawebu.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/7681316959.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3b4ed797e---79250973837.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/b3kp4sel5pc4tebmeupt63cs45/424525056.pdfIn PDF document text
    • http://tktravel.shop/FileData/ckfinder/files/20210603_513AA78E21DF1500.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/78895355106.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/pi9k9sdo0j0mj9o8isr0cqb846/puvatifodaxakaji.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/b6jab1lo2fslmgbu4qhi3tojr1/59475882928.pdfIn PDF document text
    • http://mp-journal.com/media/file/44499088940.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/7f07edfd0e547f49d5306885d0a0d2af/zidovotimibumif.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/guremogipimidamiganufa.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070860b4555c---gekijumesisudetapiw.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210608/1314047857.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/xasamogawirenibazumumiro.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/80cbb4d0c45675b84be6884c60bbd5c3/sixore.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=logarithmic+exponential+and+other+transcendental+functionsPDF 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_off0000e2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F1 18032 bytes
SHA-256: 90e1a9d4e8b3b6d957b3344a564b7f749bb1b4d81d74f8e3b382b630879cddf0
font_01_sfnt_off000112ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CE 11224 bytes
SHA-256: c3e3090a778f4cd0010fac72be357ce5e7a1855b52b9a32b258e1dfc72c26fe0
font_02_sfnt_off00012cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB6 16280 bytes
SHA-256: 4f449dda0d9725a06eedeff7bc3c143fad980f0518aca35e7c51b9941f1e44c1
font_03_sfnt_off000142d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1