Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac1bdeec3e2bf769…

MALICIOUS

PDF

90.0 KB Created: 2021-09-07 08:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c7a93a6d458e0faef8659e77a6007bd0 SHA-1: 0e94fd7f1b2fb2b0c4b29b7cf14c9fdc1dc11238 SHA-256: ac1bdeec3e2bf769140d829182d54c532a57673099ad23d6c7a05e272cfe29d8
204 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a payment redirection lure and a link farm, suggesting it aims to trick users into clicking malicious links. The ML classifier strongly flagged this PDF as malicious. Although no scripts were extracted, the presence of multiple embedded URLs and the nature of the heuristics point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.dean-cpa.com/files/adminpic/file/zikab.pdf In PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cadd387ee---soniki.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/a6u35cf15manber4uva352gff5/46413799184.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8d6ce6447---80933855978.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/wabibowevipifina.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072ea29922c4---29006213915.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/dc8dc016935de68bcba2c057ef12e0cc/56975838301.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/d02e86dcb37bd2e2d413e4fcbfd4b45c/zilisoberivugilusavoro.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c2d283b88---zufubod.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160a5aedd4b423---zewezukerusaruzipofox.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/kegabusolixatomegapemoxen.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/87563092312.pdfIn PDF document text
    • http://pratiklinik.com/img/userfiles/files/rikakivoxojadepikuperux.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/63262da0013e2a57535cb6004094515d/gazuketejiponopolepadit.pdfIn PDF document text
    • http://tangiahoang.com/skinkorea/Images_upload/files/fizunetawisakizeromanom.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/43125121048.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/96520209087.pdfIn PDF document text
    • https://biovuspharma.net/userfiles/files/pewikekam.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/99949827191.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/pabolar.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/8471878103.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/341317289.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=chart+of+accounts+quickbooks+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/458eed3b7dc1f8ef1d48b50d566a8b76/69240326388.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_off0000fbd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD0 11048 bytes
SHA-256: 68f18f655d745be6d960209b446121fa6f9d4099a05b2fe5633ed5f49fa3bcfb
font_01_sfnt_off00011510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11510 17420 bytes
SHA-256: c1d799453b4eefd543cfeec80790b912ed8016d255d8c8266921b3b0bab37510
font_02_sfnt_off0001425f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1425F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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