Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e59dabcda70950d…

MALICIOUS

PDF

89.3 KB Created: 2021-07-19 12:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 922e67a30f4cc39ea904fdbd491b12b0 SHA-1: 634be2004955b6bd59c9d8d636ed0840acb6de0b SHA-256: 0e59dabcda70950d3a6ec2f08ac0757f8a62b6829fa392e98a139cd5250b58e1
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF containing embedded JavaScript, flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it's a link farm on compromised WordPress sites, specifically designed to lure users with a payment redirection scam. The embedded JavaScript likely facilitates the download or execution of a secondary payload from one of the listed URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc8ebdcfda---nafavosidobefumetafib.pdf In PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afff9253f47---68796324071.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/nevizizi.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/xelenirujobenuger.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/81b79b296805da11f8e61d3b4582d8f2/sopawokikiliremefiwiwigib.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/letawaveni.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202106010806122170.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/0d218b2ab6cb2ad58315633ffd10cbd2/2432305986.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/kok851vh0gbp1q4l3b8lv8921q/vitubozoropesevab.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/zixamudujanigejijewijazev.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/af9ktqpc1e3ok29ht6287snq75/bamizuzegokeruguvedevo.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce910ee5c4---lesojadibolidisorikolamaj.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/pajolineguzakazulufori.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/mukokoritafam.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/denesofebopadiwalavukasu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943cfc69031---30174396034.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/fisajejigelisuvej.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/8f96b850917d313916af4b0f632f99a3/98613891031.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/33094a55ab55cb5b2dfadeb51156b4bb/54167099632.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/q292uso7thd8euhu9krgucufbq/62652270338.pdfIn PDF document text
    • http://ewinghighclassof1963.com/clients/e/e4/e4cb61fc1babc639533983e887b7272d/File/tazubotone.pdfIn PDF document text
    • http://hodori247.com/uploads/files/96217795677.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f067090c75---52559446698.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/nisawavuxinisedemovebabe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=cash+sales+of+goods+in+trade+will+be+shown+in+the+cash+flow+statement+asPDF 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_off0000f8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C0 11180 bytes
SHA-256: c6fef378206a1b243088ec63ae099f370d65abc2c4a06246b0658ed5908aa314
font_01_sfnt_off0001129b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AAD 17168 bytes
SHA-256: 13c18831b437ba3ced5634b02a2f7843d0d47d2dc1f9ca7d3938fd93e8ef196d

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