Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4cc294239d6b6a2…

MALICIOUS

PDF

84.3 KB Created: 2021-09-02 06:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c9fa80fe0463ab25fbe0baaabebe30fa SHA-1: 3ec403590c21845b211ed975d2b2f0ac5c97a802 SHA-256: e4cc294239d6b6a2e5276402fdda7a79070877a574af61d2d913f8d36a017239
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to compromised CMS uploads and disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://allytemp.ru/uplcv?utm_term=electronic+structure+of+scandium PDF link annotation
    • https://toocapen.com/files/41158017275.pdfIn PDF document text
    • https://mszukam.pl/dat//file/gudes.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788ec6e9c5d---37514728406.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ea1be8b9b---funulu.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/63465804471.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/kukomuxasenozib.pdfIn PDF document text
    • https://amblamy.ee/upload/file/fazeb.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a645480a7b8---musavafaborire.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/d48d1df1b89ac660c5bdb4c482b5337b/gizonalasupirutebimek.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210731_214427.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/41629951635.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/jenazabopul.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a4634f7af30---25953611937.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/kixadawevused.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/6dc29d334dd3d1fe3af98b5b143dd43b/jumititupakemerodopumine.pdfIn PDF document text
    • https://33mobility.net/uploads/files/13618232499.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/23104868074.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/7m4hcgbivvl446chkqdg4mmccp/winepupiniwiwozaza.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/72296702117.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc99373da2---4429552826.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/372480227.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/5529abb66ce6f4cd8d889bc5f94772ef/bobapavafefeb.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608098a948f9f---tetikezewibidez.pdfIn PDF document text
    • https://sieseam.org/userfiles/files/mutupaneniroje.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B6 18308 bytes
SHA-256: 7c1d4c64623ead57c9451c06f946934af4a146c9ea4d76e19bcaca058ddb24c2
font_01_sfnt_off00011185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11185 10720 bytes
SHA-256: 1958baa1535faac553a618ac9f0c454d59c8ad24d88fb2ae5072dd39c415dfdc
font_02_sfnt_off00012a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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