Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab5b7982a9f83aa…

MALICIOUS

PDF

93.1 KB Created: 2021-07-30 22:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0d56141c725fc708cdc3ecce23434528 SHA-1: 4ac78535499022c9249225929a4c2c55d7bea044 SHA-256: aab5b7982a9f83aa6cd3681dc4122ff7f5079e6ce85eb78c7944c7aebe3567e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it is designed to exploit user interaction to navigate to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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 http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac08c6ea74b---83397662729.pdf In PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/46dc6004674e86f689bf2f0d851a588b/zujebegurufabidobobu.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/93374679581.pdfIn PDF document text
    • https://x-software.cz/data/file/razuxakenukukus.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2213a38edd---47447450240.pdfIn PDF document text
    • https://unosms.us/userfiles/file/15859657906.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160963ede2d89d---jubojidadosakek.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/41784639378.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16070505fc8f1f---pasovupawubelogabupaw.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/88723917398.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/gupem.pdfIn PDF document text
    • https://netpage.info/userfiles/file/69461377657.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/c7d615b181a42bd15ee338ff59b045ad/9979659072.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/5c40d06b9037b30e31462d60e5231c92/tobimavo.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/xujageruxugajenukexe.pdfIn PDF document text
    • http://northwestpixie-bobs.com/clients/e/e1/e1941a3904c49320334fd90e0ed9e852/File/30680965476.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a863e45b2da---mewubojodosejefatu.pdfIn PDF document text
    • https://cristalensi.com/public/File/mijuginenepibidisonor.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/ik5racf8pfqsumaoc0hg5q4tqf/kodawarojigagimimiduvadid.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/nebuzefowu.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a209a4fa1---puvafi.pdfIn PDF document text
    • http://bcslaw.hu/admin/fck_upload/file/36884908056.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecb3491e98---36287262705.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/43713c39a79dc05a2a64997b07ca48e6/29043346580.pdfIn PDF document text
    • http://watsonwilliamsreunion.com/clients/82103/File/zalujovafireture.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/15c6199b08081b0da830f745049f8209/mugazekitokox.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/93147250838.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=fortune+500+companies+list+globalPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607505a2a55cf---32497332463.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_off0001008d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008D 11192 bytes
SHA-256: ca11bfcbb5f4b2ef83c1f74174a838162a5c07c641b311f50fcec2e3fe8e545c
font_01_sfnt_off00011a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A83 19920 bytes
SHA-256: a210acf7faa10c3d394d9b2cbaf718aa0adc0ee129400111a758beb30808c0e6
font_02_sfnt_off00014db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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