Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1cadd16972a12b…

MALICIOUS

PDF

75.5 KB Created: 2021-09-02 00:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9f58a877d858bc6e2c4eaee929f367fb SHA-1: 879f52fb8699cd30390bfbd8690f1305836187d0 SHA-256: 2e1cadd16972a12b8ffa05edcca557a873ecfb22bd2061918baef06b77f72905
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to lure users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://protectname.xyz/whoisprivacy/userfiles/files/84733295307.pdf In PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160867eb2c81c7---zaxesupuxo.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/pazeriradazisivufen.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/161065c9b068df---81156432590.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f308042ad---49721056409.pdfIn PDF document text
    • https://successalpha.team/upload/files/nezewif.pdfIn PDF document text
    • http://ladna.pl/user_images/file/virewozepefikipowezi.pdfIn PDF document text
    • http://gaytonfa.com/upload/files/detusitamukoxufatawiturub.pdfIn PDF document text
    • https://mlspoland.co/files/file/datofiwagupodewi.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/5ca1c671ca2e23c39f788bd1e409dfdc/padimozogusoku.pdfIn PDF document text
    • https://astefin.ro/ckfinder/userfiles/files/tunikatuzakoni.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef565cebbf---47089414786.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/43456196170.pdfIn PDF document text
    • http://nutrisoilvietnam.com/upload/files/34426624667.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/76daa31bb87a6b4a3db22b33de81bbbe/68738783173.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/476faf80f65aa6bc2ba40a72ad674658/78468670566.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f577b26b7---27140066494.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/rogugamosorenilasudep.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/33645678817.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210627145140_tnbusd.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/85927487216.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/jopev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=format+of+project+proposal+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_off0000c647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC647 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5E 10692 bytes
SHA-256: 114f41816873878ea4c89a5cce9e8ec15fc061e3d50dbf20ed86c6494dd01f7b
font_02_sfnt_off0000f6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F0 15800 bytes
SHA-256: f8ec2b81062396d94056f8dba0970b3368eae5029aea7a67a38f5b76a31e081d

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