Malicious PDF — malware analysis report

Static analysis result for SHA-256 24582debce33949c…

MALICIOUS

PDF

79.3 KB Created: 2021-08-03 00:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d22482f1235cf0bb3fc89c1e1a2330e2 SHA-1: 6cb722cd222f07ce67759346cdcd4cf917e3f11d SHA-256: 24582debce33949c38c612efa5e1b918e5be1e358a7101c815ff3b8cba5b5a14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The embedded URLs, such as 'https://smidgel.ru/uplcv?utm_term=default+cimc+password+c220+m4', likely serve as redirects to malicious content. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://smidgel.ru/uplcv?utm_term=default+cimc+password+c220+m4 PDF link annotation
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a29d59861.pdfIn PDF document text
    • http://k2plusinterior.com/userfiles/4186686436.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160aa4a9a54b4c---71505794345.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/14615148945.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/89261267747.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/ba9a749e99fbda9f525e8ba973fd0b2e/16906394989.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d92ad1cd8---32322072834.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160ba89d159cdc---85287094399.pdfIn PDF document text
    • http://moon-villa123.com/CKEdit/upload/files/20892386728.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/zopiremosepaler.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/6e5a13b1a50c22f77ca4277b942ff6aa/zevizebeluzix.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c2728728299---94570964565.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/31816474446.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/14289726559.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc05ad8a03---sixadipus.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a875ee3274a---nosarekow.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/nerolavubipevetesa.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1ed963cf56---mogebizir.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d8dd4353c34---komevofevobapipabivosuve.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cf67c80c2---pumopemotat.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607524dab1340---66283917153.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/xaledagadebexezaxalixu.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/drq2vne59dqnbso57f3gim3mvm/59277007001.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/87885291054.pdfIn PDF document text
    • 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_off0000cff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF1 11184 bytes
SHA-256: 1d72df5a84bb829f88e3bad4050521b45b5aeaa94a8e1098c4b22f4b530cc9e4
font_01_sfnt_off0000ea40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA40 17020 bytes
SHA-256: 08f31b66abf80c336550719854b9618dc5fc3570636aad3ecbec96163a6dd8e4
font_02_sfnt_off00011691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11691 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1