Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2e2e6313aef7d3…

MALICIOUS

PDF

80.6 KB Created: 2021-09-19 19:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: bddc0b4223aaf5858da8f7df38028c59 SHA-1: fee0879b9323be8470f26aa9114f4be5ab6ef4c8 SHA-256: 9f2e2e6313aef7d39212d2c5e0670d20be8246b49032de83f35be1c316520349
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript suggests it may be used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://charmingcurls.se/upload/file/41630600895.pdf In PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/fq1mtpl0nhb8ihi9koveev1ps6/29359304855.pdfIn PDF document text
    • http://www.autoservis-hubatka.cz/admin/upload/ww/file/gawajadewemaforod.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614164713eb61---64145976309.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/jipapewozipuzanebibotuxov.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/53711709971.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe7670ba22---71234228366.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/84762247118.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/jofivonuwudizagixifusa.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/levozobut.pdfIn PDF document text
    • http://stylekd.ru/files/lilogulurek.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/rifijarupebomogusasip.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/96612722653.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/87815906469.pdfIn PDF document text
    • http://coolscape.info/images/files/jisule.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/zowonoginemewavara.pdfIn PDF document text
    • http://aluminial.pnh.pt/js/ckfinder/userfiles/files/zopazetu.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/12830541716.pdfIn PDF document text
    • http://www.depomatrial.com/file/60361017074.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139965dc6d3d---toluxamosirebivatabuju.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b35135b9a7---53360655862.pdfIn PDF document text
    • http://holzweiss.at/jivikatilazawimimubedav.pdfIn PDF document text
    • http://canoto.us/Images_upload/files/91441209272.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/dumafejujapev.pdfIn PDF document text
    • https://casaalu.com/luutru/files/94182809381.pdfIn PDF document text
    • https://cananalimdar.coIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=sustainable+logistics+and+supply+chain+management+pdfPDF 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_off0000d6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EC 16632 bytes
SHA-256: 08a2e4c3aee94867d5d98b7245490cea9f175c9ca3d7bfb23ce8cf894dace2ba
font_01_sfnt_off000101df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DF 11396 bytes
SHA-256: b5b2a52e9dafbd22e239397a489d1ddc78c55a33ce810dd2398d5341dc17a2af
font_02_sfnt_off00011c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1