Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17e07ce36ed6a5e…

MALICIOUS

PDF

85.6 KB Created: 2021-09-06 18:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 120262f98437dadbb31cd4d015967777 SHA-1: 40f286dcb1a87876188dd5b6178d5628baefb9de SHA-256: d17e07ce36ed6a5ea2fada1e54282c7767c4adb8fc852ccac1fbef8983eb3341
204 Risk Score

Malware Insights

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

This PDF sample was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to compromised WordPress sites and other disposable hosting, suggesting an attempt to host and distribute a secondary payload. The presence of a visual download button further supports a phishing or social engineering lure. No scripts were extracted, but the overall structure and URL patterns are indicative of a downloader or dropper.

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://autotrasportifenoggio.it/file/94330285662.pdf In PDF document text
    • http://bjsprt.com/uploadfile/file///2021052300322979.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/69793050255.pdfIn PDF document text
    • http://modern-pro.ru/files/file/11977948122.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/i0jhdqlgu2khatalf8fijuirv7/23116041181.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/simokerafibalogituru.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/62614355308.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/miwipuruvumuru.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2c7900394---kekosodatofal.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d06efb126b6b4a6e36a45db9a8903591/naresukovujilujal.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/sedutusi.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/tuxatozov.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1608c916db3e0e---61433864567.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/vudufibo.pdfIn PDF document text
    • https://codecs.roimages/file/22669165176.pdfIn PDF document text
    • https://eastmangroup.org/ckfinder/userfiles/files/8118054543.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff7cb2c347---89296837316.pdfIn PDF document text
    • http://ke-sen.com/userfiles/file/1630619937.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/lekamajavunow.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/87f7914692e55f6acede11573cea2301/93604094030.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/3a55a9dae570fd29a0d65cfbc8afb29c/xomunap.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16098925346959---51341428767.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/42ioqede3dj3j08p8tg0iinvc0/74637127523.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/p67oodkjvi3iohtcdri6nskv91/pafamizazeraweba.pdfIn PDF document text
    • http://cortocircuito.trialpanel.com/images/Upload/files/lapurubutefuwowezilo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=modificare+file+pdf+con+iphonePDF 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_off0000e95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95C 18328 bytes
SHA-256: 05a84e0f3a7c597343fca4268eae6ece3bdc658b2b725d49b77d777cffa29561
font_01_sfnt_off00011929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11929 10444 bytes
SHA-256: 07d188465900a0b56feee7e844941129b6c8856e1e2b17418d2292390d93173e
font_02_sfnt_off000130b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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