Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa06f2f9bcaf544…

MALICIOUS

PDF

76.3 KB Created: 2021-08-02 02:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 72cf01bfa459d67e0126eb1fb2520dfd SHA-1: 6a241c3a5650cc1173f2dcefc9f3e7bf56a5606a SHA-256: 5aa06f2f9bcaf5446b20026c802621f39922987affc8917baf445bf65bd45b4a
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. The presence of numerous distinct hosts and links indicates a coordinated effort to host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4893205e4---97437831571.pdf In PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/0l4of1idq40j2jet20a8ialsqt/69476733011.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/92607950516.pdfIn PDF document text
    • http://st03.it/userfiles/files/75067666982.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/kajazenatigu.pdfIn PDF document text
    • http://hodgesmageefamilyreunion.com/clients/c/c9/c95619ca3ec29dd030dc8935b97378d4/File/donotogazusowup.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/da130de3fba04d8f0a28db3bcde850bd/felaxurufekixuboximitaf.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/nojexajeta.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/8e39e213bb067352c5a541cf736447a0/vejonitililut.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/97307444943.pdfIn PDF document text
    • http://charivne.info/images/file/babiputujavagirusaj.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/228675973.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16083ef9b6422e---rubaluxew.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/ninadak.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/pawotaziwa.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2769f421d7b6173023c70b06159b9518/papoge.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160f3af7b8e98d---5898093816.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9987b5855---zirebolulanuburin.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-5-22/20210522062516409320.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607a411283103---75454295538.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/65320753547.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/307b481ff354529910fc019b0879ab91/siwoduza.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/71345950860.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+contact+virgin+pulsePDF 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_off0000c68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC68F 10792 bytes
SHA-256: 18393c3a5159a9519a27a98124594ecbd434c4fa0496b60f3cf1212bf1783eab
font_01_sfnt_off0000df9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9B 16756 bytes
SHA-256: a392dedbe86d0085c3da18c6dba5b2e839cee37e83f6c7236fdb949f13854eb3
font_02_sfnt_off00010b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1