Malicious PDF — malware analysis report

Static analysis result for SHA-256 f01dc971182225ed…

MALICIOUS

PDF

79.6 KB Created: 2021-09-04 16:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4819ee7b21c53acc95e001c0ca1614cb SHA-1: a15612cad638a2367e73eba3ba6e94f3b7e09b35 SHA-256: f01dc971182225ed5bae9d683d41ab5f028c599ffcf2dd07583134d16767d19f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to manipulate search engine results. The presence of these links suggests a phishing or malicious redirection attempt, likely to deliver a second-stage payload or harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/be81d4715660885d22dc2b0dd68a588a/94148029070.pdf In PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/b52cb5dd329905ed4bbcbf1687e0ae1f/20379791802.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/62510939503.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/jagawit.pdfIn PDF document text
    • http://fructusartis.com/i/File/juxutuwepanipaj.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/zawiwosesapufakedav.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/rkr15pv9gu59nt1fs3jq1acun2/87984003199.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/3c960694790f90c3ae449131c899af28/gabokipusalonugakow.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/vofejodogotirixotogaze.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/99710858308.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/11693178647.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/54668831030.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/374v97t9kg9kirif7c4m3ieqlm/50104267274.pdfIn PDF document text
    • http://wlpp.net/images/blog/file/kagibe.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bb923ab78---tazavobunel.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/11001228683.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/legas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=e+aadhaar+card+pdf+file+passwordPDF 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_off0000d0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FA 10584 bytes
SHA-256: b1509d820683fc00cd4a4664b9d9a6792475906929be076f24db5f72d21bcd2e
font_02_sfnt_off00010140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10140 18836 bytes
SHA-256: 2bed0e5c24e9b0c8bd89331426e136c123ef09c0e57f0ff02cc195b6db1f65da