Malicious PDF — malware analysis report

Static analysis result for SHA-256 c92ac24d44b6e838…

MALICIOUS

PDF

87.7 KB Created: 2021-06-28 01:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4f738b4139c53b2995f80a67190cb1ba SHA-1: b49d7066ed41f3e313a418cdcfe66a9ce4488006 SHA-256: c92ac24d44b6e838d637ce373659ba47c86386475a598a995e259bd5da845774
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains numerous external URIs and links to compromised WordPress upload storage, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate that the PDF is likely intended to redirect users to malicious sites, potentially for credential harvesting or to initiate further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=if+beale+street+could+talk+book+quotes+with+page+numbers
    • http://smcertificationservices.com/userfiles/files/71995063234.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbf24d9b260---fepivuguvujenasepaj.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608b42b64878b---xonuwugapidu.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160af723425305---22192948819.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//50020224667.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890ffaa3a5b---popenazadijusojaxurak.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/85ca433ea4682c06d35aab3991ec0461/wowakagokofak.pdf
    • http://pathtojanna.com/userfiles/files/rogodur.pdf
    • http://esoftland.com/userfiles/file/xekiwepajaxemuwadopabavum.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885e0436c58---kafavarejibofiluv.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8c249b749---15854798088.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/d5e112d52f9420e473fe0aae89df6551/6115642371.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a384593cea9---52308125895.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/05e2d1242cf47390e7a40eca444fd8c2/segajafareguranonogomob.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/db7f183d6551925baac5dd19c761735b/59066575679.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160960adc1dde0---xetivitunipoxajedevig.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608726395cd3a---92748499704.pdf
    • http://pcccphucvinh.com/upload/files/zakujiperegaw.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd8856056b---51702688752.pdf
    • https://electrabicycles.pl/app/webroot/uploads/file/16205690554046.pdf
    • http://homeopathyhongkong.org/files/dufepemubiruvidu.pdf
    • https://masini-de-ambalat.ro/images/userfiles/milufijavofoxejetigub.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a160b182aa8---guloberotesavudomufo.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6975546db---duxoluxinaxu.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_off0000f0a5.bin
8bc36a1c602120b0efc5d07bec06470582b78fc17fc236a8e197e63b5c907fc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A5 17600 bytes
font_01_sfnt_off00011e74.bin
b9f676b2242e7111550399145d030ae71f8e6f388e35d0d85f8547fa60e8be31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E74 11584 bytes
font_02_sfnt_off00013916.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13916 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.