Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced1b3e0189d5c4a…

MALICIOUS

PDF

90.6 KB Created: 2021-07-22 17:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d8dcf9c3866af91f45e34c4bcd4df602 SHA-1: a21ce2b057e6fcd6075d9127b7194ea8ac3cf7d0 SHA-256: ced1b3e0189d5c4a4f01ac6768f0043553a48c7cd70d5d5a55d1900975a5e8ed
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by ML models and ClamAV, exhibiting characteristics of a payment redirection lure. It contains numerous links to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, implies a financial or invoice-related theme, aligning with the 'SE_PAYMENT_REDIRECT_LURE' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/f7a1g1d0umtjmi180el26mj0tj/tefevejamejowo.pdf In PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/41704960059.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/8ede6ba9fc5d7e4d4c1fe10411f40d36/80582069845.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/72067343285.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d80cae701---futirudogudojin.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/f2223be7cc199f03801687b92565f2ca/79405858089.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/470a2cb139ff266ce97524316a1a54a9/biziwi.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a13b0a1e8c---89164886787.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/rumenavojubeji.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/77618830376.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/53019875819.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/wenexabutepepeba.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2139176f5---58384727839.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/60c4tn8tditmr4oq8k8jm9ivfd/47134573981.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/pixex.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ba04f0fe8---xuwepuzojet.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd6874c285---90781942238.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16094d6afa54f6---98533306814.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/45c7bd3ab3ee0e761240da417542ef33/30881919974.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a6d6ec24b---tuxebakofivage.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/dfjrfgglhn3rjq9349ga0u2tnu/gozadamejosamijixezakawo.pdfIn PDF document text
    • http://kasargod.net/uploads/file/jumasexod.pdfIn PDF document text
    • https://kocarbonag.com/luutru/files/9995744902.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/72682237208.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/kogiwesipadidadofu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=all+types+of+journal+entries+in+accounts+pdfPDF 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_off0000fd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD47 17000 bytes
SHA-256: 78b813cde0377274aa7c24983a22087d5bcc2edf6b67ba7f2a37d34d5958f512
font_01_sfnt_off000129a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C0 10936 bytes
SHA-256: d9366e740badf2e90599909ee4b8401be4b46e7c6025f8c502278043029736ad

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