Malicious PDF — malware analysis report

Static analysis result for SHA-256 123b9f335e825a41…

MALICIOUS

PDF

89.0 KB Created: 2021-07-07 07:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9883c339190543ce19bda97225c3627c SHA-1: 29bbd1eca1eee322de046503b364c89ee577f7ef SHA-256: 123b9f335e825a4102cc77d01e4214fa7bd19de5e490f00f564189c7b17c560b
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a163458f51---77276324217.pdf
    • https://cbdc.co/uploads/ckfinder/userfiles/files/xetopofesafudapojovagaf.pdf
    • http://157.230.241.115/image/upload/File/75535162091.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16081d86830f54---55689182634.pdf
    • http://waterlootour.com/FileData/ckfinder/files/20210706_3988A4ABA7E634F4.pdf
    • https://maximatrimony.com/ckfinder/userfiles/files/gasokuraxonogenazibibir.pdf
    • https://ratsimae.ee/media/contents/file/59032853779.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/1mp3omsr1qfluj1t22koa9otum/nuzubunimosanagep.pdf
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/43402609526.pdf
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jisamatebepigobiremo.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070bed49225a---didevesaxijofoberi.pdf
    • http://mfcwestenkwartier.nl/beta/userfiles/file/torepajanobaremiriwud.pdf
    • https://beaszemin.com/files/30765687586.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/08c2d36c374c75a37780ddbca748f8cd/turidasarugadatuxomi.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/fho8p79mhd0u8ndpuvt4460103/28262311171.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a098760b636---nobitisonunilog.pdf
    • https://cbdc.co/uploads/ckfinder/userfiles/files/44864552918.pdf
    • http://www.alcera.ca/userfiles/file/gulajozurabizojidi.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6acf4abbc---sopixe.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/2dda0c6d1bae07424d7f5c92aa17edd0/vevopuforumozevog.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762a6ea8ef9---rikovepasidejusagad.pdf
    • https://amd-export.com/site/upload/file/wulututububopawixixubam.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-4-28/20210428230623854375.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b33fb9a95---15406059966.pdf
    • http://conblocmanado.com/pics/file/10992420730.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=helicopter+eela+full+movie+download+mp4moviez
    • 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_off0000f8c1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C1 16792 bytes
font_01_sfnt_off000110d8.bin
4841620ab9d8ebcfaf2e77aeb80ace5e3b5916cc753b557d45cca9381990a8dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x110D8 10992 bytes
font_02_sfnt_off00012a6c.bin
1056eac9417acd22662b10f171e68a4f243f71b97daf3315c6b5e1a38c799fc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6C 16948 bytes