Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a747f1b7136bb2…

MALICIOUS

PDF

67.6 KB Created: 2021-09-12 11:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 03720d9e41b7f8eee98efbe4acda70b6 SHA-1: 3076551a5bb9bb9decab7c25f568229081ea2569 SHA-256: 94a747f1b7136bb25fb868dab7b483a5ce4d9153e12659efbaf295c24ea1a4ca
132 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and exhibits characteristics of a phishing or malware distribution campaign. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded JavaScript indicates potential for further malicious actions beyond simple redirection.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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
  • 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://infrive.ru/uplcv?utm_term=among+us+impostor+apk PDF link annotation
    • http://microcement.ua/userfiles/file/83553196282.pdfIn PDF document text
    • http://agilesolutions.in/uploads/78670770718.pdfIn PDF document text
    • http://comitatoamiantovelodromo.org/userfiles/file/ritezavased.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/16788878679.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2dbfe6662---487520203.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/fuzozep.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/jetolokibofema.pdfIn PDF document text
    • https://dichvuketoansg.com/luutru/files/15104334092.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210901051426.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/11029478830.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/wamidamasilum.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/32921641108.pdfIn PDF document text
    • http://bojovesporty.cz/userfiles/file/23961614205.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/161341edcb0eab---jewitusakununu.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/3100258c0cd9057fbfd675f1b122b803/zubos.pdfIn PDF document text
    • http://etepi.pt/js/ckfinder/userfiles/files/dunijigokaxinipugi.pdfIn PDF document text
    • https://songod.vn/uploads/image/files/suvisuwubikato.pdfIn PDF document text
    • https://maturana.cl/upload/file/588170501.pdfIn PDF document text
    • https://salondumariagededijon.com/userfiles/file/62350473031.pdfIn PDF document text
    • https://digireg.ru/upload/wozimonaluzod.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///muvevuxexaz.pdfIn PDF document text
    • https://ka-base.no/images_students/files/begatufagi.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/vexuriripuwaxefoti.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/mijufanevikasonigimenu.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E3 10588 bytes
SHA-256: fe5a6d84f0109d8acdc1a168c0917f068232d5f85464ef22579e4c4242e59faf
font_01_sfnt_off0000f01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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