Malicious PDF — malware analysis report

Static analysis result for SHA-256 474fff814b08f75b…

MALICIOUS

PDF

73.7 KB Created: 2021-06-27 21:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ba310117c9db3aff8edade91c3279064 SHA-1: 884aecf90f0dc8a83ea0c0c777d170b528347241 SHA-256: 474fff814b08f75bf4298021af8c89840a249f066318c0d4d78c516144f13fea
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. It also features numerous external URLs, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 https://ketchas.ru/uplcv?utm_term=cups+and+quarts PDF link annotation
    • http://gtshotel.it/images/file/56647963508.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/189c2605c360b3f607b52ae79a8205cd/mofaxom.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b0350c63a---76484899208.pdfIn PDF document text
    • http://usmleworkout.com/files/file/93366065296.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/sasosabonet.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aedfde2529e---livoxamojasezifenonux.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/fovojilixu.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092820e3d41a---malavozabifinapodak.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/jofefelodikifilibirifek.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0941c205---34401031293.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/kukemevasedeboxamijijid.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/jobam.pdfIn PDF document text
    • http://cezanart.com/userfiles/file/roliridunabazavixilawa.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/sqqcr82gvl81b9mnaup4r9jl2n/damureba.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16087292249ad7---20845704904.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/35555084579.pdfIn PDF document text
    • https://eberli-medical-supply.ch/upload/file/vinafipesezol.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/39897628761.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/wedemifasoren.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/deduvewera.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210609_022053.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/d83ab4d9ff6e7e398e925296f7224889/kubeterel.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0FD 16292 bytes
SHA-256: 3814d0762c717f35b65aa2237ca96a7352309cff77d096d7458618996df2f496
font_01_sfnt_off0000eb12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10329 10272 bytes
SHA-256: c00ea82e74e7c48efebeac020925f41578f4fbd33e6b58fcb5b491451ae0858c

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