Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e2432bd2c18679…

MALICIOUS

PDF

83.9 KB Created: 2021-07-27 04:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b75163f4babe598c07cc9a8725d18fa3 SHA-1: 5a772549fb758293e1906da79731d25228e70877 SHA-256: 05e2432bd2c18679e242e18fa46a470a6d0ac71d0540c50d17fd382507da141d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm for phishing or malware distribution. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML classifier score further support its malicious nature. While no scripts were explicitly extracted, the structure and URL patterns are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/ab61d8c02bc095fa54a88ea41543e8ab/sinakivilupekesigomaker.pdf In PDF document text
    • https://ctapigroup3.com/contents//files/25069959772.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/17252798942.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/paxodasavuguxu.pdfIn PDF document text
    • http://mentaplywood.com/images_upload/files/47727015508.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/80359506936.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/92931893387.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/vojegaridegusozudov.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/wulubusowasifibafepudores.pdfIn PDF document text
    • http://starsunited.at/upload/files/36597426206.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608268af4bccc---wuwuxolotogebiruzibasurab.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/49b38235781baa4818b5f5fc5d644d21/sexaxawididekotub.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909c1164416---92208528172.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/87070286495.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088d05e9e3da---3634152036.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/27543204584.pdfIn PDF document text
    • http://marymo.ru/uploads/files/91396293062.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/57794196065.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a48b0c30204---68927342394.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/32851833246.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/c1a24a3167103a78f53a4c8ea47e3552/57521102411.pdfIn PDF document text
    • http://skikk.eu/app/webroot/files/userfiles/files/92358700761.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/maladipat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=fall+guys+ultimate+knockout+free+download+pc+crackPDF 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_off0000e415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE415 11332 bytes
SHA-256: 48eabac010167e4e86a49239ce031d7c31e4cd078a41d1e61092fe02edfde43c
font_01_sfnt_off0000fe9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AF 16700 bytes
SHA-256: 2c1c821d42b22526b550bea35bf26892d1114c94f83985133ca0243c99ec1d63