Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0134072c056de02…

MALICIOUS

PDF

195.3 KB Created: 2021-08-15 12:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 231ede35e562e6b3fe36bb21b2a11757 SHA-1: 89977a5a4e72216d0b36929ff2d08ec1976447de SHA-256: b0134072c056de029529187c296deb1bbeb2e5fe41beac8791e3fea29f2b8859
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of multiple external links and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9699

Heuristics 5

  • 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.
  • 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://coretry.ru/uplcv?utm_term=historia+de+mexico+i%C3%A3%C2%B1igo+fernandez+pdf+gratis PDF link annotation
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/1c6da9dc798a9074d998714c9a25c413/rugamaxusedomobexasumop.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/4937f6ef3adf5d491b47eb1a8602e866/72020224342.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210714_08047FEFB9E72A07.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/91024347329.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/34298595420.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d44819c90---tixirozijukupukoluritepox.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1610b86b669160---motipokejifovikaj.pdfIn PDF document text
    • https://longhoang.vn/upload/files/mabikive.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16086220993b88---nofemiwito.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/bv9l69ato79ngcec1cn3ck8e05/tagepijedefika.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/19231436186.pdfIn PDF document text
    • http://klpa.net/userData/board/file/wudizizukigirutarimos.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/vhi8fpagjqsn9hpbjedj1rr6i0/jezena.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160a47fdb32509---96463246299.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/34549054140.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/32174518340.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/6194888391.pdfIn PDF document text
    • http://recviem.ru/img/upload/38139656044.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/43513752506.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/4400563753.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108a1980f5a0---2148753203.pdfIn PDF document text
    • http://consade.com/userfiles/file/88463611014.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_off00028d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28D91 24108 bytes
SHA-256: 3b7f378913f809c60bb9626fcd770f211dda0e1d3c8b510a5dd227d3c044672c
font_01_sfnt_off0002c8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C8EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002e106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E106 11404 bytes
SHA-256: 1954abdec2b2f5591843d0a3032e8f74b5f5e0d1cbb67be9cb0f2d54345c22e9