Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e65ef9ebd349ebd…

MALICIOUS

PDF

80.6 KB Created: 2021-09-07 08:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 13c55f757f3c1b14c87e2f2f57face31 SHA-1: 372ad340ddf51971ffde9dcfb5ef370cc1882755 SHA-256: 7e65ef9ebd349ebd75a9739abb646038f944dd761de0f08f934cfcb3e9df0323
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to potentially compromised websites hosting further PDF files. The presence of a 'download button' lure suggests an attempt to trick the user into downloading a payload. No scripts were extracted from this sample, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • 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://www.mds-horizons.com/upload/files/9785048204.pdf In PDF document text
    • http://ipceurope.com/assets/file/sipobisipedafegurebos.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/33117426702.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/c52f8a6713fb6b963570f7dd07228fc9/napemesurameme.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/33724889550.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/voxowirotawedubuw.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/49825538559.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a1901921659---95551192921.pdfIn PDF document text
    • http://stopguepes72.fr/userfiles/file/fumibofepusosexikukopibe.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/ghq2jpedu2voinq64s53ovj8q1/napolepetebisavulu.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/suvebumujevivowaberevizif.pdfIn PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/vedivewa.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b67b72348---radav.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/44343860590.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/kunesig.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/ruzimamuxupunejexeguzo.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/legodilani.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/55958394946.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/94927812797.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/pulofakexetamutesifujitiw.pdfIn PDF document text
    • http://ckm-machinery.com/userfiles/files/pudisigogo.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/mjla2i88k152ta090qd3ujdlec/tubuw.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/57873785611.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/jozesepurosupupenek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=ntse+sample+papers+pdf+class+9PDF 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_off0000d524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD524 10608 bytes
SHA-256: baf1866cafe715a03b136e5a363bf9e53e73209a6452c7490f78c6cb76bf8293
font_01_sfnt_off0000ed75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED75 17940 bytes
SHA-256: 0f4b54f62d0139a4ec198ceab40fbf1d8d1a6c218d7e0805ba4adee3f68a1056
font_02_sfnt_off00011c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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