Malicious PDF — malware analysis report

Static analysis result for SHA-256 122614be1a0002da…

MALICIOUS

PDF

93.6 KB Created: 2021-09-01 18:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5a8636222b2632756459d3a40dc06003 SHA-1: e7547692866b1ac696ab8729c7f3909b22d9deb4 SHA-256: 122614be1a0002da8f33c32e69e45c92166abebe4a2792a28b6d2429285d1a44
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains an embedded JavaScript stream and numerous URLs pointing to compromised WordPress upload directories, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of JavaScript indicates potential for further exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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
  • 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://ahs1968.com/clients/d/dc/dcea35c349c70fb55dca458fc6558ff6/File/95324068430.pdf In PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/575nbfvim3nnqaeccbe9c5k7c9/92874668179.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/e3023918a7f7d1d11d57a945a2ea05ac/rinozakufutalutosubasa.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/dujakosuve.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/ddcde163fdab1cee6797a103cbcf12c7/75046738324.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/bexaje.pdfIn PDF document text
    • http://rhodeislandalpha.com/clients/56223/File/titolerabof.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/qpgktqroiir2ttmm0q903g05kf/95339985937.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/lejedidobenerugojevol.pdfIn PDF document text
    • http://bjjiffy.com/upload/rugulirafevejesidometeraj.pdfIn PDF document text
    • https://uudanbury.life/files/file/sodinigimufakim.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f442fbf2d8---giletote.pdfIn PDF document text
    • http://ozdermusavirlik.net/userfiles/file/9781353342.pdfIn PDF document text
    • http://carscaso.com/js/upload/files/81265950418.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/44265351674.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c31e3e501d---gutudikapikox.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/ba0f3db3c37065cdcb07c38a46532066/74813203907.pdfIn PDF document text
    • http://wamer.org/userfiles/file/xevumopapogewu.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210814221635.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1610cc971eec37---papinizidomesuposumu.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a4392ee934a---jomikosekige.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa7e16edb---64683810272.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/puduv.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079d86dbef7c---kinega.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/moranirupusuvemoxesofub.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160be31b115589---bavewasorig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=worthy+is+the+lamb+holy+holy+is+hePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE668 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE79 16196 bytes
SHA-256: 169d99dec78378e26b0f202e9030b8eb649decff50f6aac577385713ac8a10f8
font_02_sfnt_off00011440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11440 10516 bytes
SHA-256: 16d465cd04830b374a812f633a21657d2da05168b07dec706bb470d22c09d111
font_03_sfnt_off00012c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3D 23416 bytes
SHA-256: fd2e65a7e27bf6fd3c9f726ef46486c67c13d681bda29e9ca1c33077c9fe99a4

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