Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d0e040a9440b97…

MALICIOUS

PDF

86.6 KB Created: 2021-09-08 06:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e8ba4bb8b099c7a9009f355cdafd1ac6 SHA-1: 8deea0d6862193501bb53e3d33fa69ea5eafce86 SHA-256: 29d0e040a9440b977b52b920f082feaf351d04e83480be8074135af877d3c101
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to obscure the ultimate destination. The presence of these links and the PDF structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://rajaunited.com/contents//files/33445960857.pdf In PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/vezez.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/tawoz.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1cbf13741---74916278794.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/neluweraxewosusipud.pdfIn PDF document text
    • http://knupress.com/pds/editor/file/50147778660.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/29230698576.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814e7ee6f20---bixumagilo.pdfIn PDF document text
    • http://brukbet.com/user_images/file/3304630247.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210904235421.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606f62e5b749b---93932337135.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078b415b4c2a---fokudasonuwoda.pdfIn PDF document text
    • https://apizf.org/public/file/debiruvonofakerajot.pdfIn PDF document text
    • https://0800-707-808.com/upload/ckfinder_temp/files/20210731220949.pdfIn PDF document text
    • https://stl-log.com/htdocs/cljr/data/files/notujav.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a75b4b9e043---96131090066.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/68759558450.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/19cbb2941d328117e0af1fb768ee439f/gidixenamisufedejakopuno.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/vvt6ebbgf63o5r07870eul9i21/powojo.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06ff02118a---9218126888.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/13962026711.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/prljk5jtk668pm6jeh5rp6kbp1/janumuseboxovarunafolu.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16100c09a0fafc---9170429303.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfa711bf30---57998343872.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=isuzu+d%27max+2018+service+manualPDF 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_off0000e7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DE 11128 bytes
SHA-256: bc3221013df8952bb843de366b23452c331b41d99bdf8354338628c089aa145f
font_01_sfnt_off00010203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10203 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A15 18600 bytes
SHA-256: 4735df19ded349bac72c6bd45748b846e92182ed2a4c097905eeef65010dcbd1