Malicious PDF — malware analysis report

Static analysis result for SHA-256 545249665e81e8cc…

MALICIOUS

PDF

87.4 KB Created: 2021-08-25 05:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 8e4bef112d9e556e60c2a6f8337a2238 SHA-1: 7d603c5a40c52cc1abd581f29b401c64a854b3ea SHA-256: 545249665e81e8ccc40f0ad6e6fdd9d6c93572303ffd5ac1f8a251ab85574446
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by multiple heuristics, including ML classifiers and ClamAV, as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites used for hosting malicious PDFs. The 'SE_PAYMENT_REDIRECT_LURE' heuristic specifically indicates a business email compromise pattern, suggesting the document aims to trick recipients into making fraudulent payments by impersonating legitimate financial instructions. No scripts were extracted, but the presence of numerous external links and the lure suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • 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://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16096b5cfb0fc1---64333910175.pdf In PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/rosenejiti.pdfIn PDF document text
    • https://hijaulumut.com/contents/files/vufekogivoxefiwixekejofaw.pdfIn PDF document text
    • http://marketingnews.fr/images/file/wimofafebabelumi.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d1ec1fc89---23516293512.pdfIn PDF document text
    • http://roocenter.ru/upload/file/36697685228.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/05262cf3c0214746c8614effb7b98614/tugavufufe.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/61063263443.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/76864c2ef3e637d36095a9ae9c20de90/49876094386.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/5576683793.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609078c64a2d8---dimexewatixazekovogo.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ba89e9dc1---43639972376.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/kukexexigepebuw.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b59372bf0e3---31575919698.pdfIn PDF document text
    • http://pincesorvarshop.hu/editor_up/40762095810.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/2243110777.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/14766153404.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/54858916081.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16077a47857059---fomusokupam.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/papixururijufujo.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/887fac87e2154f4681e3b5e990313f36/pomelud.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/sipomatixu.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/24902875276.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=bank+statement+request+letter+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBA 16080 bytes
SHA-256: c9fa871d706934500ba7362bcc2679cd089fe7f1d29a584b92b55675ed6be739
font_01_sfnt_off0000f3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF9 10836 bytes
SHA-256: ef99d2a28e423e5c3104bebe2eddeb142313cf3f81ee5774c8032ca61d43bf9b
font_03_sfnt_off000124cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CB 16680 bytes
SHA-256: b1e266fef85bb2e2cd4d907c93c3863c9c3e7b509fa8c31859a6c7be24a04c93

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