Malicious PDF — malware analysis report

Static analysis result for SHA-256 17cec37b1701cfcc…

MALICIOUS

PDF

82.7 KB Created: 2021-06-30 20:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5896d3cd634dc4e630516eeff9217db4 SHA-1: 721ca67c11fc6667b7e8f18512c7740a509d0197 SHA-256: 17cec37b1701cfcc659e1cb7ceb43c2399b0cef4691ff267e50cb593ef8e7fbf
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs pointing to compromised WordPress uploads and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://crewmak.ru/uplcv?utm_term=can+you+get+off+probation+early+if+you+pay+fines
    • https://aprilboya.com/userfiles/file/38118640053.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5913ade6df---lukanif.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160892e0630f0d---17097433179.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160db05cc4c0fd---23456089738.pdf
    • http://advicetao.eu/pictures/file/fadagug.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/b6fd8fb9876d80199efac2e87fdfb66d/52738033935.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e5a33452a---xoxanevawawipidav.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5f7920e7b---miveritomotasolagaruzen.pdf
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nuwepepizezoberazazuw.pdf
    • http://brilspa.ro/userfiles/file///39836117131.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160777ebedf8be---lofogiwoxitadeludavaxudu.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075ee4faa437---42783588828.pdf
    • http://j-club.eu/userfiles/file/80368885004.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b135ee8e5c---77627613066.pdf
    • https://fullgame.hu/uploads/files/dipaperawufotodujut.pdf
    • http://tipiland.net/upload/file/49852413028.pdf
    • http://bindashnews.com/userfiles/file/xewolik.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/3de1maqs84bjr05beu3165l3jg/96587735432.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/df3cdffcaa5d6fd717ac93bc16c1054e/43580156658.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd2418923f---62062101481.pdf
    • http://trendybiz.in/usersfiles/file/wolavekem.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe95db40f5---42812552899.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/el76opu1jvhusbhunntltn2ttk/89848004082.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_off0000df88.bin
34996badce279b58ae4bf9f50f7d7793e3476a1e6adba553b182a84692a14bb0
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF88 10920 bytes
font_01_sfnt_off0000f8c4.bin
57aac9373c67d1d0cf982a57be0476c5d627ec658a473f77978dcfdb48e5fb0c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C4 17124 bytes
font_02_sfnt_off00012544.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12544 16792 bytes