Malicious PDF — malware analysis report

Static analysis result for SHA-256 12700728b22a3707…

MALICIOUS

PDF

99.8 KB Created: 2021-08-21 11:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ea5639fe071ae841de43fccaedaa028c SHA-1: 49abf60df4602fe9bedcf548e85e9b1dcfcc0220 SHA-256: 12700728b22a3707ed43a9a43bdb0fa46133b332e0eb016ad1cd656a1b39b868
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites, a common tactic for distributing malware or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of multiple compromised domains suggests an attempt to lure users to malicious sites, likely via spearphishing.

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 http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e17254d5e---29508603973.pdf In PDF document text
    • http://angarakshaksecurity.com/userfiles/file/karutirenabiveguguda.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/643a3889d904f74e39a45da777f7ccad/fugewiruboxaxorera.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/namizi.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/70123142765.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff94f2e14f---97814078262.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/25803219095.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/febosenuxipikoredi.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210611_CB2C1D2E1578C1ED.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071810e35fd9---73258034946.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfacaa319b---xenibixoxejunova.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/lilaxo.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/41109956790.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913056ed8a2---70939072049.pdfIn PDF document text
    • http://khautrangkhangviet.com/upload/img/files/77606480168.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7cd8f4008---33610331641.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774ddb13fd7---14631537880.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723042d106b---nivowapatela.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607caa97928fb---widad.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/3bh44n6poa6hm6n8t5fkaphjj2/mosilomagojikejeset.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/56031698564.pdfIn PDF document text
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/xerefonikidarel.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607538c23430d---86724768275.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=my+hero+academia+season+1+episode+3+tagalog+dubPDF 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_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 11532 bytes
SHA-256: c7e26967b97c9d818ee5a308d1308ba392de4e25e3985aa963cfd13e52991514
font_01_sfnt_off00010da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA3 19756 bytes
SHA-256: 44e66ea4c602a724a70f68ad1dcbab74d31809cce10120622e595b7af5a0569e
font_02_sfnt_off00013f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F81 12312 bytes
SHA-256: 0233e6a5ac2c8035fa8e99408689beca84d4beaf3a19ea124222bc4ecb407394
font_03_sfnt_off000167ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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