Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa168277342c0afa…

MALICIOUS

PDF

85.7 KB Created: 2021-07-15 17:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a5eb286eb88c3e53d9c24884d133984f SHA-1: 6fb2e50cd3829027cdc0d6374bfc3b18954b51d1 SHA-256: fa168277342c0afa0e23a9a3670e7b9ad8c64cd9aa67d78b40d649cc32ecb47a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs that form a link farm, pointing to compromised CMS uploads and disposable hosting. The primary purpose appears to be directing users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=1080p+movies+free+download+websites
    • http://studiogiovannone.com/userfiles/files/51759164283.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/6h9255mp3c743402r91o1g1394/18778195517.pdf
    • https://termoformat.md/img/files/fodoguta.pdf
    • http://www.aluvascientific.com/UserFiles/file/nerenuxulevanotawugorel.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/lm8ie043rfhh2auu8fjdpcmsg4/61935124058.pdf
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/56460189368.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090fbe83d8c0---23234383593.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9de387b82---sinamadozojeremufabit.pdf
    • https://yingzhaoliuart.com/upload/file/pivikediwapuzixa.pdf
    • http://orderleesushi.com/uploads/files/semonofivibafamudesig.pdf
    • https://aspirans.com/files/file/liwovifuwodimuwilo.pdf
    • https://biorenta.lt/ckfinder/userfiles/files/zowilamonekajujufasaw.pdf
    • http://mtsskzy.com/userfiles/file/39347071654.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/3f421c70e66da3d64005e1ac9f2f50ef/nizunisaxedirowefawo.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608c35a169ef2---lajiminebegawud.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/8c37876825acfb73531e47e3fe4fd6b9/sapofepavokekonudafepem.pdf
    • http://qazaqbanki.kz/data/content/files/39694748599.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf79b6d6a92---zopolesufulinotugekufegex.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/131d5ffb065da7a6a5cd1223c21636b6/47944378003.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982e6fba8ad---95095140258.pdf
    • http://slhs1958.com/clients/18590/File/ruzusuzamemobegab.pdf
    • http://gursakaryahukuk.com/images/file/vofadona.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607deea8ac4b9---venevadukep.pdf
    • https://penzionradvanice.cz/res/file/93891273214.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_off0000ead7.bin
f2040ba20bb4810c7c8a7fd02983349c3e5fb830d5faae79a09e1b33f21aa8a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD7 16944 bytes
font_01_sfnt_off000116ea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x116EA 16792 bytes
font_02_sfnt_off00012f01.bin
6d9d6a185185df8886ccaada6de25d1b2323c9bf2142f2ee941f66a3415e9226
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F01 11236 bytes