Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f853f0c360661d…

MALICIOUS

PDF

85.6 KB Created: 2021-09-19 23:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aeb5f02a735c7241187e00ed56637947 SHA-1: de5fb1d7f0da4c16b3770e015aa0f301754433ec SHA-256: 95f853f0c360661d9f223d671d702506132af382e5117e021ef6cb18cdad6585
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external links, many pointing to PDF files on potentially disposable domains, suggests a link farm or phishing campaign. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to trick users into clicking links, potentially leading to further compromise.

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/jekutipodi.pdf
    • https://berettyotv.hu/userfiles/files/63559673460.pdf
    • https://metnar.pl/web/uploads/files/851523203.pdf
    • http://abnig.friendship-match.com/upload/files/10406301266.pdf
    • https://biorenta.lt/ckfinder/userfiles/files/jogelifelabifimiki.pdf
    • http://myucpb.net/userfiles/file/5145987868.pdf
    • http://begemot-rus.com/uploadfiles/file/2021091111121173499.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/161362aa79f92e---46997314946.pdf
    • https://simondaulte.com/ckfinder/userfiles/files/biwedexawawivulodowirinoz.pdf
    • https://sdhouse.info/ckfinder/userfiles/files/57163633634.pdf
    • https://euro-m.si/web/dokumenti/file/48882509531.pdf
    • http://agriturismolataggiasca.eu/userfiles/files/voxozitisuvilikuriw.pdf
    • http://guss-ex.de/uploads/fck/file/67010299645.pdf
    • https://primer-spb.ru/files/files/9118923472.pdf
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/51645259113.pdf
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/ruweketos.pdf
    • https://www.fangjin.org/ckfinder/userfiles/files/49985043012.pdf
    • http://arucax.am/user_images/file/59407515944.pdf
    • http://daming-school.com/userfiles/file/virivovonejizoxe.pdf
    • https://proxkimya.com/resimler/files/5115735789.pdf
    • http://tovicetour.com/FileData/ckfinder/files/20210911_5A7B150977AF78F2.pdf
    • http://tlznailspa.com/media/files/80609759926.pdf
    • http://fgosvo.ru/files/files/40964602254.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=discrete+structure+mcq+questions+with+answers+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7dc.bin
070ea9bcaf2529d32580c1915de79c6979b1665f5449da80eafe047eabd69c7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DC 11172 bytes
font_01_sfnt_off000101a5.bin
282c86d0892a63e3a1678bffc6e7676cf56badc36b4f9224b5062763e7a43bf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101A5 17964 bytes
font_02_sfnt_off0001309f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1309F 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.