Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f15803b12de53d1…

MALICIOUS

PDF

82.7 KB Created: 2021-08-16 10:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0843d8821c6e329e974cb7156e754e9a SHA-1: 17c106250d63d75d33c4e098646521b930266da2 SHA-256: 2f15803b12de53d1741bc191e0109e356fd800be626f62ca21576717274f6044
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. No scripts were extracted, and the document body was unreadable binary data, preventing further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/dq5bhmjk89k1o1vibnk12nm425/65192435419.pdf In PDF document text
    • http://budohurtsa.pl/userfiles/file/fijixuteg.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f20f64d9e5---9632017391.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/b991582e88c1d3b48224d25c5ab24fa3/damorop.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b56600af87---95186414879.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/vone1hcrhh2ej09ftgqcp3jt8i/xavemojarujimizuxo.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/tazogajumoxupul.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/susagilaxitogibir.pdfIn PDF document text
    • http://cooper1972.com/clients/b/b4/b451ebb09e7e0345645526f893d9a49e/File/rozolazujaputovi.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/pogusajasazimovuzogan.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608476aaa3f0a---dakolerowozebesowuvip.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/20949631822.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085e58220d7a---81969400383.pdfIn PDF document text
    • https://telechips.com/ckfinder/userfiles/files/91418147075.pdfIn PDF document text
    • http://netflor.pl/upload/File/dukekonowajewusiraditofoj.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/0dq9pmj7mup2966itpdn8socpr/18819498663.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/gapofusepazifotises.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/puwebeg.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/10362851900.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/muzilekaxogiku.pdfIn PDF document text
    • http://greenld.com/userfiles/pefeziremexurumugaber.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/2987984341.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=hannah+montana+the+movie+2009+castPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF662 17664 bytes
SHA-256: 793edaeb448771d41da9dd47322dc7fef6798d47b5768bac9a354d6d58f1e2fe
font_02_sfnt_off00012467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12467 10816 bytes
SHA-256: ca116743047596a3ce78bdc5c62b1365a4e42a5cda91883a725742eeaa69ced4

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