Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4e0648cdf2fb34…

MALICIOUS

PDF

78.3 KB Created: 2021-08-06 19:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8d01976a4ce1c8fb8652b1c6ace12cdc SHA-1: 7a09f0042a26d5afce5e8569a2b173967817f5fe SHA-256: 7e4e0648cdf2fb341808e822329a590cc436788eb2b959463e85e9aeb632f527
156 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. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The document body is unreadable, but the presence of many external URIs and compromised CMS upload links indicates a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://huntic.ru/uplcv?utm_term=how+do+i+turn+off+the+fan+on+my+whirlpool+microwave PDF link annotation
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160acf67f37c59---56339351602.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d46515dc45c---69883097252.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3ab489c47---kisiwatodufaf.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/88091dbb271736ca5c7ff34687100f23/684166962.pdfIn PDF document text
    • http://slphs66.com/clients/e/e6/e62fa13cff665df70d7481f632b33819/File/16124407853.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079e6764bdb7---tuvokizufifiwusipofox.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/marawajugaro.pdfIn PDF document text
    • http://lowry-averyreunion.com/clients/c/c0/c0e4e7922159a76f956c19110b7bfeb7/File/34658052645.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fce275481d---77154927038.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/5cb2d7c5a2f81c60b8682647c1ff2341/40166880066.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/41263370668.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/ubafalufelelire.pdfIn PDF document text
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/37361585449.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7e2227102---xabuxaxepopa.pdfIn PDF document text
    • http://atraba-holding.com/userfiles/file/25347142950.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd615057b4---81193267117.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/ef25bf9b53ec2ad4e1dbbe8785ebbea0/lotivego.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/wotuxalosa.pdfIn PDF document text
    • http://barahi.com/assets/userfiles/files/bebaxugemukukudono.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/41190292206.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/225ef0f0eeeb8f1d6a51646e6c6fea79/51175839076.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/tisorunidikuka.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f657f131053ddf7f90363d43450ed2a2/ropegap.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609e31ef33351---xulozubarebev.pdfIn PDF document text
    • http://elm3rad.com/file/dabujejametojab.pdfIn PDF document text
    • https://blugarden.eu/file/fawonilozobajali.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/b7e4518025d1b9cf289a35a2b73a2cc2/tavak.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_off0000ceb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB4 16132 bytes
SHA-256: 3c83ba4d7eb58ee8097329425c64e43795419267250455c3b8d92fbd1c74914c
font_01_sfnt_off0000f85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85D 11072 bytes
SHA-256: 12126ea2edfe99427a8014bb658f554efa6698e4417a83048322e61a5a9bbad5
font_02_sfnt_off000111fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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