Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0be4631da5aac7e…

MALICIOUS

PDF

94.4 KB Created: 2021-08-10 01:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a34d852a45a41a3dae980ae1b2f09c86 SHA-1: 1c06387f99003c70d95ead192901844d0c247e0b SHA-256: e0be4631da5aac7e6ad16bd579e5779a5c5909cedac1212731575d1b4e4d413c
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery through these external links. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://pachetedeturism.ro/images/files/gijiwozerik.pdf In PDF document text
    • http://mya1fc.com/files/ckuploads/files/jifefururopeta.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/73fbde28a72d47279944c6e46b04fed6/jotaronopude.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160995917bcfbb---74989659487.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/tipafudutagevibif.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/33290892877.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/9c182a8bf40b7f90220dd3f8e74ced1f/zafoxasenamagurerukazoveb.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853694020a0---92697773602.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/78332436284.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/cbrdb8t8jo9vogvtqt7894tjkq/majunasijivo.pdfIn PDF document text
    • http://iworking.vn/uploads/files/pizezixizixunodogep.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/qs2p186vlcverhkvqqk8gj04a2/84657686173.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/pudulonejogomoremewugomam.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/veduseludabaf.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/rdik04ndt5ofc1o2c51l14dbct/xidokurikaxemiroxiwisugu.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/81294224782.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/wemifik.pdfIn PDF document text
    • http://myredm.ru/uploads/file/84694967719.pdfIn PDF document text
    • https://scanclean.bg/upload/ckfinder/files/lowojeratiridewixiwevibuf.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/1e65a44924e2422602a6553e98aa2fc4/51941005923.pdfIn PDF document text
    • http://cooper1972.com/clients/b/b4/b451ebb09e7e0345645526f893d9a49e/File/94825139183.pdfIn PDF document text
    • https://kristinanamaste.eu/files/lowabuduxasasobivilominem.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/6c050bc10c15a1f21c38a634ca8b7ca5/54024318907.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/sajemuwagemowevigidif.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a286a3b0955---33724706022.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=mario+kart+tour+add+friends+redditPDF 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_off00010bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAC 18396 bytes
SHA-256: 272d0f21128fcaf2b9458183dc104b4ac1eb3763cf1bf3f7ac40da65a4461e42
font_01_sfnt_off00013b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B08 10484 bytes
SHA-256: 3143afebe5324f025ded63e09b538f10ac8597c261b8dc307e85aacb575bb9c1
font_02_sfnt_off0001530e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1530E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1