Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f58370388a2991…

MALICIOUS

PDF

79.6 KB Created: 2021-09-02 18:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 02aa9e2e45afd77a0245c84067bf27ac SHA-1: 2ac29a58e2716fe6bdc01d9029011f2c66621608 SHA-256: 64f58370388a2991ef5172b44f32a3a2231d6f7c9148c376417a60c2301b73ca
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, including one that impersonates Facebook. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically credential phishing. The embedded JavaScript likely facilitates the redirection to the phishing URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://oniceh.ru/uplcv?utm_term=occupations+spanish+worksheet.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://oniceh.ru/uplcv?utm_term=occupations+spanish+worksheet PDF link annotation
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/161300a5ba0bc1---81607703195.pdfIn PDF document text
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/rumunarefiramupowiludad.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/xeloparepakinivifuf.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/23106957073.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/98279286221.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607b68aadaaa0---lavewuwamiwokifoj.pdfIn PDF document text
    • https://timjanen.se/anvandarbilder/53/files/jebimubatovixud.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/41119058276.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/jjjuh723jco5emqlent6k7kuu6/21768390784.pdfIn PDF document text
    • https://laptopserwis.com/app/webroot/media/files/11567459388.pdfIn PDF document text
    • http://peach2560.xyz/js/ckfinder/userfiles/files/42761463818.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f028d5e45fc---devumasowezunimupakize.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f08fef77ca9---tiwokidixu.pdfIn PDF document text
    • https://ocbond.org/userfiles/files/dolugosasodowuxapoxux.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/9b36d21b7f97a0c36e5b07a72107143c/pepolisurixudu.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/batolakevinukemelu.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bb0a9eff7---77529686187.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/wipitod.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210705_6D46C557E0A9A4F6.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/sekoramopuzifobe.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/nijesadinolusozetoxi.pdfIn PDF document text
    • http://efeotokiralama.com/Upload/file/6564656659.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/xupagolepagaroxu.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/fb3ec917162754a81e06fa96e7941cf3/lelogevibaturora.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_off0000d050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD050 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE867 10728 bytes
SHA-256: 0a1900a453c851552057d24e83b34779440ce377a9676ced9f65e3c3d8902e68
font_02_sfnt_off00010123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10123 18420 bytes
SHA-256: 765f2ac4477ff38c360756c068722126f7ef4d59ec46d734a6c3434a73671301