Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a47b3c0ad29bb49…

MALICIOUS

PDF

115.3 KB Created: 2021-07-01 22:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 549fbf8101e76b3d68e4b8df3f5c19d3 SHA-1: 34b39bb6f31fda0ec16733deba67231c76fee75a SHA-256: 4a47b3c0ad29bb49ecbf4feb40f5876075b0f17381fad091fd1babac91be787f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites for further exploitation or phishing. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://aristosaigonhotel.com/uploads/files/62816156726.pdf
    • http://casier-a-bouteilles.com/file/gefonarasa.pdf
    • http://watdoenwevandaag.nl/upload/milanumix.pdf
    • http://sunnysideclassof64.com/clients/a/ac/acc4ccb49d7935ca36198347b895393e/File/gidasufilakovofugagomevap.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/nqv0l26lm6nphhbjgs78gmot34/29245413344.pdf
    • http://citadelcaralarms.com/userfiles/file/67385889766.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/c5d00b15fd93e5f467261856f15d2b8e/50796114994.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b695fb9bd6d---parak.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987974d743b---73081662720.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dfa49de08---fimewamibuvikalirize.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075287cef522---20497959185.pdf
    • http://vorne-sitzen.eu/pcms/content/file/waxuxibelasunisos.pdf
    • https://cafemocion.com/userfiles/file/91150821474.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/g2ljc4uv6pubbr9186guf2l20r/50052821773.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/823b1b3e881717ca5802a301bc766bf1/32898687765.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a137711fc31---19602909891.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608542294ee86---92331245485.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e014a07d5---dojibuwowog.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/9cfcbe347c5e59c3b0f9c85593e16ad1/65780973534.pdf
    • http://jp-photo.cz/soubory/files/zuvolimumiminaraxobu.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd6c5f3cef0---31525663999.pdf
    • http://alnadaoil.com/userfiles/file/molabiwerujuni.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/b2a157ff497237344ecf4b7122034079/dipudobofajad.pdf
    • http://qzgj.cn/upload/file/nizisot.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=pipe+fitters+manual+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_off000162a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x162A1 16792 bytes
font_01_sfnt_off00017ab8.bin
c0a4ea970f3c4a2ec13a6603fa27bb53f26e30e9194e720568f545b83ee25344
pdf-font-stream PDF embedded font (sfnt) at offset 0x17AB8 10640 bytes
font_02_sfnt_off00019305.bin
c77d6fdbc02794cf457dcf925b3e7af41974a60ddd58955899ea0007a06e0211
pdf-font-stream PDF embedded font (sfnt) at offset 0x19305 17112 bytes