Malicious PDF — malware analysis report

Static analysis result for SHA-256 082e33dd9af87be2…

MALICIOUS

PDF

90.2 KB Created: 2021-07-13 18:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eb50524536b2be831d160187edf0fa05 SHA-1: 4748621922289aee525e51ab298189f429e900d3 SHA-256: 082e33dd9af87be2f43bc1c002d2f34e6127954229bde366ca03fe79755e77c7
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, directing users to multiple compromised WordPress sites, likely to host further malicious content or phishing pages. The presence of numerous links on disposable hosting and compromised CMS upload storage indicates a deliberate attempt to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c0720c546d2---lefowogopegosizofobofex.pdf In PDF document text
    • http://cuatro-pr.org/sites/default/files/file/56410591763.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c87b47d70---dowerokemakako.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/fd40e6b7944b4e489bdbd352300e9845/fozavonomev.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/e027f26b3659fca25b69bd59233acbcb/6698433173.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/kemajutipupaz.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d2dc36b4e---55947115164.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/97535543f3e73e4e3bd210b7500b0476/52971042237.pdfIn PDF document text
    • https://rosycaffe.com/file/xedipumopodapaweju.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9adde8fa92---51801666744.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/31237878968.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/52834586072.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/eccb018873367892be6f181d9bc7bddc/wuvusenagorotapisijopoj.pdfIn PDF document text
    • https://tisuputih.com/contents//files/6120408652.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/38292830367.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/od5kjgpgfuaph7oriokc0jr75r/56562373374.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c30609e493---53499124174.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b99b46bb5---14310621410.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078adcb3c89b---83191216498.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/83371600678.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/529b7190bb480aa16c6ad803afc22087/11030869462.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/rejakigezufup.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/javimepigatofebekuwu.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/6btlo2qs6jr8i0j50tfuoji0bc/fekodonapokejonofe.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/fobanagukudexijorube.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/levazabokemowejerob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=out+of+office+auto+reply+examplePDF 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_off0000fda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA1 17392 bytes
SHA-256: faae5f390849c219dfa68ff4e2f81f9fd06e5c2ef45f0dbc7a3814d7f142afc0
font_01_sfnt_off00012acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACD 10708 bytes
SHA-256: 6d35fb7c9e45f3189744618b4e204eba24ae83c4f9edefa560624995d5be2108
font_02_sfnt_off0001437c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1437C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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