Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a17acd0e6b51ac…

MALICIOUS

PDF

89.2 KB Created: 2021-07-23 22:36:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d7bf794104a6e69e7a9bba017264147f SHA-1: 39c549dc485c7fff53f916ddce814a7c18a334ac SHA-256: 47a17acd0e6b51acb86f5a3f6f2ddacd8c7a6537991dab3c4f37cf3485f6cf66
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm or SEO poisoning tactic. The presence of these links, combined with the PDF_SEO_DISPOSABLE_LINK_FARM heuristic, strongly suggests the document's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://townsendrogersfamilyreunion.com/clients/9/91/912616e09393d205379ff76530a10a1f/File/jusezigovafan.pdf In PDF document text
    • https://petek.biz/resimler/files/zuxep.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/duxoxunafozot.pdfIn PDF document text
    • https://isleo.com/i_photos/file/vewetumurokuralegop.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/73301240400.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/a31f00e67d215489a38f3c278331be38/zobarem.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/bf75d9d5a6dba6765b079d10bb1bf787/78961342195.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/05f09f94008686d80bacfb760a1f35df/87499669876.pdfIn PDF document text
    • http://pitafest.com/clients/1/13/1337b7689af00ddd847345d48bd720ff/File/xapizepuse.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/8248767051.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/69628128462.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94395369328.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16081b826515ef---jozobeja.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/pamadov.pdfIn PDF document text
    • https://pubs-icfas.org/icfas_new/dev/ckfinder/userfiles/files/41031834130.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/ecc13klot3cst909blo3d0pfgc/42823954922.pdfIn PDF document text
    • http://projectcom6wrk.net/ckfinder/images/files/filiponeti.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/sipevebulitozomit.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/96ea457356d64eaa26943658fc9247cb/54130398615.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/8effeef41253e191f3d9032b2b71fdb6/61871251961.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/jidetagulixusilulepide.pdfIn PDF document text
    • https://talleresimad.com/images/subidas/files/lizilozemumojiwetojisena.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/jukodavogododewad.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16072f1c0e707e---zupizujagasigi.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/528359842.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=bloons+td+5+free+download+ios+no+jailbreakPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64B 17468 bytes
SHA-256: 0ca1797a30bd605c5ff5b672d6ec615d4e884c43f81b5735779af238d26f9beb
font_01_sfnt_off0001247a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C91 10980 bytes
SHA-256: aa4ca1f192bbdb4cff697e11e6ffd0c46d047521f7bc159df1536c68edad338d

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