Malicious PDF — malware analysis report

Static analysis result for SHA-256 8beae338dcfbbe34…

MALICIOUS

PDF

74.3 KB Created: 2021-07-06 00:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4dba45ecb77df568a1b0859a83779265 SHA-1: 2fa7bae442470d0c9651ff67a236e8e40b25bf18 SHA-256: 8beae338dcfbbe34f69d6357bf8d34dcc18c6a721bd4a90bcb0844c8abbaf822
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, pointing to numerous websites, many hosted on compromised CMS platforms or disposable domains. The presence of multiple unknown URLs suggests a distribution mechanism for potentially harmful content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gillsandgeckos.com/userfiles/file/29622019518.pdf In PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0724bd3d2---96008154473.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccfa180a26---kiteputidukipowaniperuzu.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/10990763931.pdfIn PDF document text
    • http://huntland.hu/upload/file/tijakixonovomazajelex.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/26194521072.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608db4853bcde---latovizo.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc8a45b0f9---mafajasamonuxapofonibo.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/jinobirigarusagudoziru.pdfIn PDF document text
    • https://tsegypt.com/file/ganesamowiwetarodan.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/26428300295.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/72632919589.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f3b7c0d0f---dipupiwaluvilumakabutufo.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/sutedekalojokiwaxememoja.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b17a949ffa---kodekokutepewunox.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad95c0102cb---venizilifoposivir.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/96q2qgv7qrh6f83eqa3h646739/48911913540.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/k9bo5g1rauebumuljh481eev47/83682831928.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/1624667864jazawoxokit.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/7f6771de94341e99351684698a168d21/12887468588.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=is+hot+chocolate+fatteningPDF 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_off0000c40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC40B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1D 15788 bytes
SHA-256: 14b91c9884f40492bef9883f2cc3b8357567b76da76e1bf30012a090bc1f7a0f
font_02_sfnt_off00010489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10489 10464 bytes
SHA-256: 4ec3316cc2bf2d436864313ad55b2fb5e029aec319d4df1caa81ece6265ffe0d

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