Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93d0078742cfa3a…

MALICIOUS

PDF

81.4 KB Created: 2021-09-06 23:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e7f10f672012d250bacd49168bc9daef SHA-1: 08bf10fcae1692e228a4cfcb06977d18f8cfee38 SHA-256: e93d0078742cfa3aa3a04ecb63ea894b55cd194eb37f847fdab081aee1233261
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous external links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest an intent to exploit users through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pixomot.ru/uplcv?utm_term=contoh+karya+ilmiah+populer+tentang+lingkungan+pdf PDF link annotation
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ce8f1561462---95187028054.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/87614552861.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/18879093337.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdb5dd92e8---69532457579.pdfIn PDF document text
    • http://avon-bratislava.com/files/files/53884393540.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/wumadixijorikewumejijab.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de9f3776bd3---35227913097.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/15827059168.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/96715944713.pdfIn PDF document text
    • http://valleypainclinic.org/userfiles/file/pexiwedevukozoxekegi.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/gifibiwenamapumo.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609b692a6cc32---gopajif.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/26585961131.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/42552952875.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeeb4422ad---63869216462.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e95400c0f---pirazezuxazefowefabe.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/nanabugok.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/poraperarak.pdfIn PDF document text
    • https://raljob.com/userfiles/file/vedidame.pdfIn PDF document text
    • http://greenvisioninternational.gm/userfiles/file/81714207439.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_off0000da97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A9 16716 bytes
SHA-256: daf77b834ef547a25390388dc351ba979d092fd44f051c03c0062152aa77feff
font_02_sfnt_off00011dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD0 11116 bytes
SHA-256: 692548c6494d8666dde99a50741d5234ef3b5ae80d48fa7182e78944d5cabf4f