Malicious PDF — malware analysis report

Static analysis result for SHA-256 774bad36575dfe7e…

MALICIOUS

PDF

84.1 KB Created: 2021-09-20 15:37:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f276edbbfbfcd0945fe82446c79f02ff SHA-1: 13cb77fa5fc9b49d627cce2245377917f53749e0 SHA-256: 774bad36575dfe7ecc4e4d6c5594033fbb1cf012f7694e08d45418fc9a193f9a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a 'download button' lure further supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=neutrino%2B+apk+mod+hack+download PDF link annotation
    • http://consol.hu/images/uploadedimages/file/nupanapogipakiwopuseri.pdfIn PDF document text
    • http://studiocastigli.eu/userfiles/files/bunepibem.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/juxazovizodoginexaguse.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/86554398239.pdfIn PDF document text
    • https://angkalaris.com/contents/files/jarasudenepifu.pdfIn PDF document text
    • http://nova-auto.com/upload/6363874617.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/gidevabunezasaxo.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/weferuga.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/ruloxovorivikofu.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9496159573.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.com/upload/files/19276032270.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16145a95c92cc8---vegoxik.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f815e44cf---mimewiforaza.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/dovitarolerejowofofu.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/tiretazazusujotikifep.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/58439807500.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/jirodikonerilofatanige.pdfIn PDF document text
    • http://www.psyforyou.nl/upload/fckeditor/file/derewez.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/vusefujitedew.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/menoxozibewuze.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e72c427440---vepuvogarebuzevigowu.pdfIn PDF document text
    • http://hoigolfbinhthuan.com/users/files/48513500142.pdfIn PDF document text
    • https://suprastoc.ro/userfiles/file/4445389952.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/33364326718.pdfIn PDF document text
    • https://subded.org/userfiles/file/7627156675.pdfIn PDF document text
    • https://pracowniatechart.pl/fckpliki/file/7868961400.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/62650726160.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/dexuku.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_off0000e1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B0 18468 bytes
SHA-256: cae6deacb00cd7335685644d3a7262190734a189af03433ff09f0f66eaf2f816
font_01_sfnt_off0001111d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12934 10864 bytes
SHA-256: 3bc775d1fe951ae25d07033c9284cac4ca22754f49ac962c5cbf71614df05870