Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9b3fd5e2adedcb…

MALICIOUS

PDF

89.9 KB Created: 2021-08-01 07:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4bca0629d40bf592aaa0fb40551142f6 SHA-1: e82ac9f4b26c92c2be4bbb7c163a901b54ae9643 SHA-256: 6e9b3fd5e2adedcb74e36393020b7afb3494852ee00ca4a3f663725616442c7c
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://laborke.ru/uplcv?utm_term=five+nights+at+freddy%27s+unblocked+333 PDF link annotation
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/9fa730814e0ba3842c0813f951efb18c/7806393226.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/faselet.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/481311ba2ac7697e34a9bb97e3e116c6/23471332812.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/50259467256.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/6e6r335f536g22pv67eb7um75b/kavadikatetoxomega.pdfIn PDF document text
    • https://beatmuellerfoto.ch/userfiles/files/54796461653.pdfIn PDF document text
    • http://euro-ex.com/jifimuw.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/nuret256m58ua4jddrb3e460t4/vafijamapezijozul.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/92563086570.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/kujurogesisepek.pdfIn PDF document text
    • https://bataretak.com/img/files/file/68442640192.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2913801a4e---63863842381.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/15586465696.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/8926478387.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2f00d53e59---19193491266.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32d5b33a7c---57171740566.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/revitaxeg.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/befcb00f3e4b99707096c02c19c8bba5/75588997645.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093330211baa---61443748019.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/kubof.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f9e19c945---mibagijapeka.pdfIn PDF document text
    • http://vetranhtuong.info/luutru/files/vibidapilejofibu.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d91c7ea1c21---suragadexefapubovakinu.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e742a9d48---lojesitowi.pdfIn PDF document text
    • https://cooperspick.com/files/lizem.pdfIn PDF document text
    • 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_off0000f634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF634 11452 bytes
SHA-256: 3322f115546a38728984cf3e7ee268a4748f41bd82d6681e8dc9049eaadfc6ba
font_01_sfnt_off00011110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11110 17844 bytes
SHA-256: b51b3e229e1970bae9e401b2e271330fe8b4c160ef06025469b67471b62b787a
font_02_sfnt_off00013f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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