Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6522479a799e62…

MALICIOUS

PDF

80.6 KB Created: 2021-06-28 20:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 543a785df736c617274382d41810a9e9 SHA-1: a783cbd67aeb33cc55770a4cb4216b64ef5f5e96 SHA-256: 0c6522479a799e627c62e8b6963572e47ef9a028bf07caa3431f4e8d9a99c1ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous external URIs and link farm patterns, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or content-luring campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://allytemp.ru/uplcv?utm_term=where+did+you+go+bernadette+streaming
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b0e96630f---rotaradagilelajidebi.pdf
    • https://gbagencement.fr/uploads/file/fegijaxofabukamifebi.pdf
    • http://st-communications.com/ckfinder/userfiles/files/22246293307.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609dae034ff54---sawegired.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160a15593c4842---xesalobemijelifez.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c3fcb3b90aa---66432868351.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ec4a63e2d---17087392139.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b17822bd9ef---15746388540.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6dae6c905---62730029555.pdf
    • http://onlineexpert.in/userfiles/file/bologoxef.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/7169d2efdb73d0b8f0feeadee66c55b7/54586944386.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076deeabc3ed---77260720608.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca8935b3f9---70757347502.pdf
    • http://murphysbeads.com/clients/54316/File/27422910002.pdf
    • http://mu-rrrc.com/userfiles/file/lusujisavawuso.pdf
    • http://nfrostov.ru/upload/files/degokojibafip.pdf
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/fafigadaz.pdf
    • http://toeicspeaking.net/_UploadFile/Images/file/67899338577.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3af1d68bb---sixefogediwusimosi.pdf
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/janubag.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/a495e1266713f8faf3c1b151d045a82b/40518803658.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b27762c5708---nitokawudezezakugu.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609036bd7a219---28719596644.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/tj1cfqik31nd3kckcpflcrfr69/fodoke.pdf
    • 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_off0000d67d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD67D 16792 bytes
font_01_sfnt_off0000ee8f.bin
c57dffad3a46f60729a4f98e2e8be59b7ed2b30010ef6f2b54a2a04b23cc7b54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8F 17400 bytes
font_02_sfnt_off00011bd9.bin
7a5872a6322e6ac4bcb8e8bb40b71740d4f52a821d740e4339d8d8a424f067a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD9 10996 bytes

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