Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eceba41dcbddd70…

MALICIOUS

PDF

98.0 KB Created: 2021-07-01 19:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6e28c9d7e4eb30b4d3624780cd86a644 SHA-1: 87ab5e8bb253822ed1f17287293e33399f40ddb0 SHA-256: 2eceba41dcbddd7010449c91240c8f5ac230644939ed6ff1518e38b8f56a0541
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link farm, with numerous URLs pointing to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be redirecting users to potentially malicious content hosted on these compromised sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • 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://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/ecf3418ac12472f94d98a77f1e7455c1/60746593068.pdf In PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/dc3cc75f8b8f6eb831004d90815db783/vuniduzig.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/460fe6e900c2ae8fbf0b756c168c167a/8838133982.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/5fc8290800dd86d5e6bbcd8313acca9c/zewugimukut.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/26006574087.pdfIn PDF document text
    • https://marosme.ro/hirek/file/zuzisadezuzalinusemag.pdfIn PDF document text
    • https://seerupit.dk/assens/file/44200848308.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/16800324478.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/ae25ab9aab7b847f396dabddf6550ac3/8490309573.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210701051354460.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/92280697394.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/5bf6a0cca780c1b0c3723ac45eaba041/97140190210.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/13622519263.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c12655464c---51956436549.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/cas2n12mecugahqu3svgja77a6/piwebomurawolaleguwaj.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c466336105b---fakudubijowinotikigumo.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/h5fiu0qqkcf3b1tj40f1m29j1p/13697408560.pdfIn PDF document text
    • https://dhcom.vn/userfiles/file/74152806489.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a49a95b36---pilububuwizifabatowarokiv.pdfIn PDF document text
    • https://europartner2.pl/uploads/30867916440.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/153691501960d62d4e1b06b.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/jhpu3r69ap8bf54klqnao9kqn2/tovijikonifugulisosodalak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=all+english+grammar+rules+in+one+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C35 16972 bytes
SHA-256: 456cf9edaf4a2ef0f8dc2438346a01ae77123c6305b5e13294c869edc1b6fdf0
font_01_sfnt_off00014819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14819 10928 bytes
SHA-256: 2e1fb189b4a07cd939523cb15af44542ed6eab09322575b81b39f9adecebb3e9
font_02_sfnt_off000160fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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