Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fac97a6af48b504…

MALICIOUS

PDF

85.0 KB Created: 2021-08-24 06:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2e07e523493c59a2997d86ad715ef4d9 SHA-1: b122525c8236ff21dd793ecc9ad61584d22eec16 SHA-256: 7fac97a6af48b5047b2c202c628e90a04d7ba5d6addf277ad1f994b49aed2f32
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting a phishing or redirection scheme. The presence of these links indicates an attempt to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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.
  • 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://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776563d5259---45597268308.pdf In PDF document text
    • https://elearning-chemistry.ro/userfiles/file/19561532325.pdfIn PDF document text
    • http://bio86.fr/fichiers/ronetudojinajije.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/penolutowivulagodazifa.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/93qc3uf7ek6fg4h7dg5efbc0ur/19989072412.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/pexapevev.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/87d661ac1602f6a67d4b91f43b390a36/1544538376.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/f6f72144572400e2bf43f137a8865a6c/52486057854.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/28456799180.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/26868471713.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c469a92ba8---57313920517.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1662a71f46---67477421707.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/gavobezedosezome.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/6g5oivvmik3jle3831ha9k25d3/nigojeromizotokajogamez.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/4b3cbf3b54d59fc5938e7935e3da198e/vorakufazebetisefad.pdfIn PDF document text
    • http://septumdent.com/img/userfiles/files/49983323592.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/tajamajoxenipapisegitukix.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c30f13dee63---funovemegobevusujabixop.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1611bbf2a5fe7f---11716290298.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/f163a358f15f2d93abbdaa21601bc300/wegugolenogifilivuwawaj.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/2dvi8v75v85bpe13kq2kk5k1jq/fojixizujoxuwupopijila.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/55093179680.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/zogalito.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdf287bf34---jomewobamegisozeg.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/554a6430d04149222c00bcd269085544/pebizutisizezonimemaxetu.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d7eb27bde89---vodigov.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769abf5073a---tixanosenaba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=best+torrent+search+engine+2020PDF 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_off0000e74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74B 10760 bytes
SHA-256: aab16712b97060b7ebf8fe18c583dd9ba2a3e80a72ef4791cd26ef1d483bcffd
font_01_sfnt_off00010017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10017 16940 bytes
SHA-256: 146bd362f8fbc7cc6c574c7ab42bc63119df11dc3a48bdb7ce31c6e5ef5af7ed
font_02_sfnt_off00012c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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