Malicious PDF — malware analysis report

Static analysis result for SHA-256 f038de89c1b1b48a…

MALICIOUS

PDF

85.4 KB Created: 2021-07-03 00:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab5a1eb0f14d1aa048e0109f79a5352c SHA-1: e5a5ca15faec3046c50e2027826fe9c8a27802e0 SHA-256: f038de89c1b1b48a4bbc0698e062e7430453667ca1f5c1c4645db49076771f35
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload storage and other domains, likely to redirect users to malicious content or phishing sites. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://currycornersugarland.com/admin/images/file/sofotote.pdf
    • https://vildmarksjagt.dk/userfiles/file/71218361377.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e56ac4643c---74335580929.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/3e65064fa49527ce334d3d91e68da5f0/12944945209.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/upqo3q9lulua3tj7ettl6djpfe/74739523287.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/6bd47f552ebcde292c74ff705ebee0ad/pimedogatepepolaw.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/nns3ghihr5cmroum21hdudavcd/86939131558.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a3c23e6ed---67500077835.pdf
    • https://eminesenlikoglu.org/resimler/files/74949903915.pdf
    • http://www.retorika-zidar.si/ckfinder/ckeditor_uploaded_files/files/43475307200.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5a9713932---59679504301.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16082542f57774---24172172200.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/eaqsvvijma5ot6t06r4udn3lm0/60763269253.pdf
    • http://aimic.com/userfiles/file/fifinijenesik.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/3g4vgcva3kh2s4q4g6hipecbo2/55431646262.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/ora8s1gmg4vmmo4fn15st2ivs7/mezupuf.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/t7ttc0nejs240bdnlmq6hpdmii/99096542273.pdf
    • https://mytopics.it/uploads/file/86862574259.pdf
    • https://heyratacademy.ir/file/34839488245.pdf
    • http://astro2sphere.com/admin/images/file/78709772010.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/c386ddd88e6c884420451d733e92c97d/70924763713.pdf
    • https://shopinhome.com/ci/userfiles/files/zapid.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=where+is+the+love+similar+songs
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb62.bin
cf91b3c845e80c5177ca032eee2fe7f95466097c3b9ddebd074025bc554714f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB62 10616 bytes
font_01_sfnt_off0001038a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1038A 16792 bytes
font_02_sfnt_off00011b9c.bin
60e756c5506ccecf44499b368fa184b27f676bf29ce77299a408949c8eebe7db
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9C 17312 bytes