Malicious PDF — malware analysis report

Static analysis result for SHA-256 672c616783ab131f…

MALICIOUS

PDF

83.2 KB Created: 2021-06-30 00:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d30eca79e99cc70fe9408473d131b60c SHA-1: f10cf88e2262d258586ef46d16c8bc115fb4b1ea SHA-256: 672c616783ab131fc3c13c6e0ca24cd91803c3e2e36491097cda3cb131836e33
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to potentially compromised WordPress sites, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to external, potentially malicious or phishing-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/808e728b296a5afca030fb5414b4accc/sugegagodamom.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/364ec53d2653a5c062c1d477ea0e1409/jeladibatunowokam.pdf
    • http://lezeckastenakosice.sk/upload/files/dabofiju.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160807d1d3c55f---kujafe.pdf
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/22363381684.pdf
    • http://feach.ie/images/uploads/file/51306240190.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c66b7b41548---39014175225.pdf
    • https://namhunglogistic.vn/site/files/butimawuzuxo.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073288d75668---xukemejinajapipi.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1420ecd9c---faxijexewelezejepasadiki.pdf
    • https://kit-veron.my/ckfinder/userfiles/files/38423109010.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bef65132b1c---kividikafigegifu.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a21bed5da04---75933130709.pdf
    • http://bandenplaats.nl/cmsimages/file/tuxosukifukanafoxigudosoz.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609157a08c2c1---rapudisexini.pdf
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/zedawo.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084002f1e1e7---digenilododuposomaf.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/08a83e3922b6dafa0908bd2adc554776/35998942478.pdf
    • https://aedwea.com/upload/foto/padewepaxasomiw.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b663502e49---79824645837.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608874e0aaf0c---javekiwoledupagexivolo.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/e7d7dbd948ee76cdc9a001057903294a/tekisup.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/13d74d1ec6266bf93c4386d99c12dc63/47399307701.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/uu85o2e2gi0e9toneutf8g25ih/bofovofifuzirogobironig.pdf
    • http://unionzglobal.com/ckupload/files/zitufe.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/b849efe14e10cb975e2beec9dc084622/53447517621.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=expert+sql+server+transactions+and+locking+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_off0000e01e.bin
8c037139adb2697728c087e5333abc63ba918decb94b122d4aee2285aa39010c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE01E 17188 bytes
font_01_sfnt_off00010d2b.bin
d6b5278113af3784960ccd424b1099d86303a59fd9504d71670a69a3fc908fbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2B 11184 bytes
font_02_sfnt_off000126fe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126FE 16792 bytes

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