Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c58bcdec658c0f…

MALICIOUS

PDF

71.7 KB Created: 2021-09-07 05:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 226b27d243898e0e9bf42056c1bd258d SHA-1: 091bb428978da945f65298f64b3e837eb04cb43c SHA-256: 42c58bcdec658c0fca790c83ce075c08999631f1a67869b3244a57c71af2d618
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of multiple links on disposable hosting and the use of compromised CMS upload storage indicate an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/a26adebe1ca2242d272d4cafb62b5b18/mezuzidomujizogo.pdf In PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/8730fae9c59593d5b9b92972dbf375c6/21507570279.pdfIn PDF document text
    • http://ccapostolicchurch.org/clients/1/19/19d200bce63520a637954fb60b162b1a/File/26734010174.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/vikurekizi.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51f3de2236---12353753089.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9ec692278---88116725948.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/16365488034.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/supewelivigurab.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/dufevidijeriv.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869a11ab6ca---xugitobozuvoxisuluj.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/vatazojav.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/53590861966.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/39191872965.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160797e6025649---detuzufuzipoximuxizuximo.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/43999970579.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85fd8d044b---pebotarakutokajij.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160828a030347e---49520272659.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/jibixozer.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/58464726875.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/sajogegujajutidu.pdfIn PDF document text
    • http://myexamadvisor.com/fck_uploads/files/56369817952.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=padi+enriched+air+diver+manual+pdfPDF 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_off0000b941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB941 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD153 15456 bytes
SHA-256: 9176269d65fbedae1fb81b5e3a8bc017652a3820e728d3936848648e55d19c80
font_02_sfnt_off0000f918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF918 10664 bytes
SHA-256: 8105479a4dce3db9875a858413fb6ce986e36c45563716de2d116f660db1892c

Open this report in the interactive analyzer, or submit your own file for analysis.