Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e51efb24f06545…

MALICIOUS

PDF

72.6 KB Created: 2021-09-09 13:35:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 60349a0790d53e8ba9923bf705f6d74c SHA-1: 01e59eb65c5ea922cbf55cbf451a7be56d39ecc3 SHA-256: 60e51efb24f065454f49ecff0c7875fd7da75491e55e47e962d5e20a4f0c99e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the overall structure and URL patterns indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://leasingtowers.com/ckfinder/userfiles/files/5820429364.pdf In PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4efbe7471---14313310415.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130bcacbc3c4---42018221540.pdfIn PDF document text
    • http://soncongnghiepjotun.com/media/ftp/file/satitibotabujuwinijizaf.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/13016743916.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/6849966874.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16139dfdee9786---25792984839.pdfIn PDF document text
    • http://aromacosmetics.bg/assets/userfiles/file/31350966034.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16139dc525c4d6---nevuf.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/zedun.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/39993778503.pdfIn PDF document text
    • https://istanajp.com/contents/files/11962839275.pdfIn PDF document text
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/xobogi.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/musozaridadogulufukosexa.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/1142613604.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/munejonul.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/69078058453.pdfIn PDF document text
    • https://koratspring.com/upload/file/62877865622.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/97853365758.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/161392b11abf27---zozolumalogovexixi.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/gezufo.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/59535864745.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/kirafuno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=free+movie+apps+apkPDF 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_off0000b972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB972 17268 bytes
SHA-256: 38dd2ee2758623110c0f129e0f50d9de933a12fc94c7040b173b85b76140a7fa
font_01_sfnt_off0000e647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE647 10300 bytes
SHA-256: 1ce1ab9785aa835b185634d392fa1853c5f3439fe82ffdd5ff013d2c84415d86
font_02_sfnt_off0000fd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1