Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae293d09e1b26dc…

MALICIOUS

PDF

73.8 KB Created: 2021-09-07 20:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e344fd578c54be1c4898262c6de110fe SHA-1: c74088ce53cbd5d6e93410cdc2bf2f005d906e59 SHA-256: 6ae293d09e1b26dceb1c45cb22c1db901653fc9cacf27507c0ee4028a6de0616
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with the primary attack pattern being the delivery of users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

Heuristics 6

  • 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.
  • 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 http://pressvaluation.net/userfiles/file/kowilafomorek.pdf In PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/72730034913.pdfIn PDF document text
    • http://hoskinspugs.net/clients/40498/File/26022532312.pdfIn PDF document text
    • http://tuccifamilyonline.com/clients/b/b5/b5aed9f4ae8fd2b300021b46b426cae6/File/78364064323.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/gibizafarapezuwigifasum.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e560b28b33---9311438045.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/03aba85bf23524c13c8fb1e2543fdc22/jurixemigamixefiwobalaz.pdfIn PDF document text
    • http://planbmedia.hu/files/34074990516.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a499f14637a---92265230401.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/bimazuruvomorerewerojunog.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/tenumawakox.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16075d214c5267---zajezizifin.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/vesiwolisesubifi.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/93a4ee4509416a32d5e90be4cd770eca/leneb.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/3ab3edc6654db5d28c75872fa5998a9b/47425790875.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/mitis.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/62411474093.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/62591514897.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/45210314618.pdfIn PDF document text
    • https://kuepancong.com/contents//files/52832263846.pdfIn PDF document text
    • http://lohs69.com/clients/82366/File/fosasopigid.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/gajexuwapifuzogawo.pdfIn PDF document text
    • http://asustainable.com/global/file/buxodumuxoge.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/92457299945.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/rekuf.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160815992c1f0b---porak.pdfIn PDF document text
    • https://galaxytraining.examinationonline.com/files/depolefuxemub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=flatten+pdf+acrobat+xiPDF 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_off0000be14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE14 10664 bytes
SHA-256: d17b6bef8298b5a1699b6fb5776564d5f710c9f40f4578f41508fee3ca28884e
font_01_sfnt_off0000d659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD659 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6B 16700 bytes
SHA-256: eb2f7d1416a67865229696eb8ba1dcb3c953957f65ab2377f520137f5b1c47c7