Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ae82b4c4a06d43…

MALICIOUS

PDF

85.3 KB Created: 2021-06-25 21:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-07-13
MD5: c171ba63d498c79956b4bb3283353118 SHA-1: 5c694c8f99ccc96cf6993c8e1a6b6dfdfe7a8be3 SHA-256: 19ae82b4c4a06d435f42e27ae8441f9038b21b069ce46a7171779fc6b23e7e2b
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish for credentials. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/3cf655e996645df24996578a0c012e9b/16616408392.pdf In PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/454ce6a3fc1d0e984cd33afa1b5551ef/kakarosuzidejazagi.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/segadid.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/pqmli1k9eh9qgei541h7kcsqkq/sozakaxozemokelefajuso.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/biwitirupizosujimunujuna.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609badde98f5a---birekidugidemesota.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/73254148523.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5a38881fa---20353667904.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45475154284.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/volefuxes.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075c432daed4---94270457913.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/vusoje.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/36660533701.pdfIn PDF document text
    • http://short-story.ru/upload/file/dumikewawoted.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/55bbf57748b71d9c7724a2ebce2bd69c/kanegeju.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1809dd7b2d---65560319076.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/8fpib7j82t635fm0003ntvj20i/xobigikorepuzezitava.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ce5002c813f---bugopipirulareda.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/5d2cfd9d4d56e2db5e1ce74b62c144c4/sogifuzukifosamadaneke.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/66710737927.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1e13ca37f---papavuvojokixodagepep.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/9cf28b29969ecaee6c1b012057ce9017/5084890663.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd75dbc606---81318211023.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/vizerefimetafe.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/3157196963.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/litudamajeritesabijusi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=walk+the+moon+shiver+shiverPDF 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_off0000e503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE503 19692 bytes
SHA-256: 1c5e3282ca629d3cc5d4f895ebacfe68d0766b9ca03a10973261eeeea579da02
font_01_sfnt_off0001163b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E52 10524 bytes
SHA-256: 0421c1eb81d2e62709bc22e12e098a6c59114567dcec20f1ce04b76def2d5cf1

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