Malicious PDF — malware analysis report

Static analysis result for SHA-256 59cc7d3e197908da…

MALICIOUS

PDF

71.4 KB Created: 2021-10-08 12:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1330cc037803e6388a7342cf773b9a19 SHA-1: 5e20ccdcd0ba8f843813104973dd9855ead1b3a7 SHA-256: 59cc7d3e197908da739ac757b190093b369a09331876e18a40af4a22ffb33884
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=playboy+collection+pdf PDF link annotation
    • http://huthamcauquanggiap.com/upload/files/76446411107.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/13756061357.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/91324843796.pdfIn PDF document text
    • http://pyroglobal.sk/app/webroot/files/userfiles/files/voterag.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/8c1a580e2597df4f6b9e891133b7c294/66227050180.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/88207266845.pdfIn PDF document text
    • https://pastijptoto.com/contents/files/8983274147.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/daxuzozedexuj.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/tuxotogapurajavabimux.pdfIn PDF document text
    • http://espicycooking.com/files/file///29817584949.pdfIn PDF document text
    • https://nhomphuongnam.com/upload/files/nuxedewuxozupopoginototov.pdfIn PDF document text
    • http://envigest.cz/upload/file/nepozoxuji.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/50209920424.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/78963866871.pdfIn PDF document text
    • http://siddharpeedam.org/userfiles/file/In PDF document text
    • http://findusafranchise.com/files/files/4579288432.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/49529807035.pdfIn PDF document text
    • https://biocenfis.es/uploads/assets/file/gelejofinaviputebepotupi.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/tiloduja.pdfIn PDF document text
    • http://aylabawadi.ae/userfiles/file/54979694678.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16140f70e7c91a---lupobegamizisebixuvito.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/nowiwejetiwijoxe.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_off0000b7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7D1 15800 bytes
SHA-256: 9532a0596459bbca1eff31fca4115ae56203e7611740bbd3ad239ae773927505
font_01_sfnt_off0000dfe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE6 10600 bytes
SHA-256: 29b66cc9790e0d9d23ad91cdb23150a4e5c863ac3050cd621bd0957f3e3e902d
font_02_sfnt_off0000f80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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