Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7ad2c8b3f20f8b…

MALICIOUS

PDF

81.2 KB Created: 2021-09-05 22:35:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1c4db2e101a0dce6144107b1d9ce8aa8 SHA-1: bb5a36da0e8d3e03f4201916bf15617d36851d45 SHA-256: de7ad2c8b3f20f8b344e1748710222b6b07f1a7174fc9328ae9a404ee620c043
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised or disposable domains, suggesting a phishing or malware distribution lure. The embedded URLs point to various subdomains, many of which are associated with compromised WordPress installations, further supporting the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac66d490f68---31850505299.pdf In PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f3a9236f3---dusafozixaf.pdfIn PDF document text
    • https://autopits-directo.migrupoq.com/ckfinder/userfiles/files/soripokibogotituzijataw.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/38761387358.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131b0aa8299f---68727439106.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/53820237211.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/xapegejiriwerogo.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/62590454406.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/nh47me36vva1jlm1aumn7dok57/womimixebelilavagileruba.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/tawowa.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/lugijikemapozake.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f85088e4ff---19386480772.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160865cc6824e7---19054392279.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/robimaftlf5khgcq1h49r13imd/62349562017.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/pimuvibilo.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091bac45d9ee---99073306562.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/kufisabekowumurekalutoz.pdfIn PDF document text
    • http://fkhd.cz/data/img/simasumubi.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b01eccabae1---gikawobode.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/ruxepoxa.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/86142088391.pdfIn PDF document text
    • http://firesecurity.sk/userfiles/file/42790267833.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/59121145659.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fee2ee39e---56953142564.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=civil+engineering+mcq+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD7A 10660 bytes
SHA-256: dbacd917e3ca300254c2df50c95c39929914bd7a5b364bf489b1a70112fb7af8
font_01_sfnt_off0000d54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED60 18320 bytes
SHA-256: 1b2f12711ddd48aa1450f7490bc6c63357fa7c6a5132c46813c27ce1d5b0a339
font_03_sfnt_off00011ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD5 18232 bytes
SHA-256: bb899fca9bcd4742725606e3cd8df5ae84eb7d50c2e9dc33ba76b7d749f9311e

Open this report in the interactive analyzer, or submit your own file for analysis.