Malicious PDF — malware analysis report

Static analysis result for SHA-256 08577283e8d85fc7…

MALICIOUS

PDF

97.6 KB Created: 2021-07-03 02:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b38fa90bf697266678f8b6b92e3d4526 SHA-1: fe28b9a5338fde927e3e44e2494c26d51a08bcd2 SHA-256: 08577283e8d85fc736492a5e2d1f13fea2c2710317fc1c7d6c777e3ebd978d05
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to lure users into clicking malicious links. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of numerous links to compromised CMS upload directories strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/19jkr3s3vc0fglu746l2c5mgsc/87352892648.pdf In PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf880e7d63---9476223533.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddb1232bb74---99540855852.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/0ab0f02c33e670ff9bb177b963f52914/39657932689.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbcb4c4f09---petopeverol.pdfIn PDF document text
    • https://ghadir-eng.com/userfiles/files/61917811883.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/9257f1c95203e46b313be6fc6ca99ca5/desotonaxenivikolawodusa.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088254ad7284---86344575770.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/82263299103.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff9af7b9d1---pesapaperiwawoxupum.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea113c04a8---55471027253.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/0a2ffe0a8b236392538c0c52a13c35ec/gawoxitufajipug.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607f053b169ee---79131729911.pdfIn PDF document text
    • http://www.celso.org/download/73651685734.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/2b56b05364d2a5174eb168d4f7e3a96d/75031126604.pdfIn PDF document text
    • http://dongphuctqueen.com/upload/files/figavaf.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ea1314f2d---satuxagogavirolifozolov.pdfIn PDF document text
    • http://dhs1970.com/clients/9/98/98bceae81adeaace0f0761aa7b0d12fa/File/41194847700.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f86c01c960---fojepafajitokiraso.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdaf80b82c4---nemojipaxoxutulixipovol.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/58522484225.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/418b53f3e5617fb43ebe4f5788c4d0f1/resabirinipoduvejujepuxu.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/2290d2fdf4b730d7592651f858b43cc8/tejuzowetoxavi.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/2d2408e22522c614f89f172b9ccb6132/febowekeri.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/74f26984d0910e408e098fdedd4188bf/joguludixusevo.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/49433860017.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=d%26d+character+creation+guidePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB7 17872 bytes
SHA-256: a6c6dd079ae8a943223324cd22d98081dee182b70f4fe38997dc4957eaf3ea39
font_01_sfnt_off00014edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EDF 9076 bytes
SHA-256: f695977626623e59fedb2fbedebd468d0acf89ff6f6ceafeb3cee4351ddee6c8
font_02_sfnt_off00016184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16184 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1