Malicious PDF — malware analysis report

Static analysis result for SHA-256 920619a5cad18532…

MALICIOUS

PDF

134.0 KB Created: 2021-08-01 01:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6c34777279eae914aec009624dd33fbc SHA-1: 1628c57d7ff96280f0d9f459905f64826da39b44 SHA-256: 920619a5cad185326d98cfc361fa1a03c8e56b43180d45774bc3436e1a1c67fa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous external URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the overall structure indicate an attempt to lure users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ketchas.ru/uplcv?utm_term=warhammer+fantasy+roleplay+4th+edition+review+reddit PDF link annotation
    • https://floraplant.gr/FCKeditor/userimages/file/80318475961.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/66473864961.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/7195971168.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/bedevikirekorebuzufevodu.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cf33ebd26---97832601953.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d6fb98d91---tunexobolilegesojuwojuwa.pdfIn PDF document text
    • http://imaginove.eu/data/Files/28985012534.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/parewaduxev.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfb98aac12---45063694353.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d310941c316---firopavosize.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/11570079741.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076cb36d67a2---37197008795.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8d1dbc7ac---zasijaxutupixagewidol.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/875d4890e87f382a8e374b3cc9bd4344/satefidukojipuxan.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nisali.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cd3752a70a4---64283300578.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/15533351590.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/jawanuwogab.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/070352346723.pdfIn PDF document text
    • http://skupka54.ru/upload/m/23186627002.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/vuzora.pdfIn PDF document text
    • https://brs.jo/userfiles/files/39149530692.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8b87ef19a---kuzabinavojubofe.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_off0001a902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A902 11100 bytes
SHA-256: 442469221c462de927e6a6b2bf4b43cb5b47f2917ccc6ae7ccde1306615308fc
font_01_sfnt_off0001c2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001dae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DAE0 18400 bytes
SHA-256: a01f3c4d3562a3cebf4c2584c5735895afd08991c864b07ff3d83b1582c53b34

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