Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0217d2b8bde9c8a…

MALICIOUS

PDF

94.7 KB Created: 2021-09-16 12:35:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b782292edddfb0b3e27ac1fd7d886d58 SHA-1: 0ea00d236ea49bbf8e29af20ee9d4499bfa990ca SHA-256: c0217d2b8bde9c8afbd405b9dae8d72b86ba08dc583fe1da3048b840919e5e56
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, which is indicative of a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is part of a link farm designed to obscure malicious links, further supporting a phishing or download lure attack pattern. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://special-pharma.com/upload/files/95709031539.pdf In PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16134fd09698b6---boxifegobamulabi.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/21451597052.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/59257533703.pdfIn PDF document text
    • https://hankilfood.com/userfiles/file/20210911085913.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/56282910848.pdfPDF link annotation
    • http://dellalontra.it/userfiles/files/17593609769.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/liboraponovob.pdfIn PDF document text
    • http://4chan.ro/UserFiles/file/54017205673.pdfIn PDF document text
    • http://immobilieninvestors.org/userfiles/file/jujuxitipu.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/28152550944.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/pimidonajujeduwojiji.pdfIn PDF document text
    • http://yuli-china.ru/d/files/35745306934.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/busowagikex.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/51762147592.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/detawexijomofonepol.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/523cbfd0e2dcb01e9eade9d903c5e631/8725141765.pdfIn PDF document text
    • http://yves-segers.be/userfiles/files/witupabufurinajonosetu.pdfIn PDF document text
    • http://gardatrans.com/content/Files/denumuxujezozisalujamafu.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/gawisajokarubepotirotig.pdfIn PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/katuzul.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/69833353261.pdfIn PDF document text
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/gibuzebofifilixesizuje.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/89732800181.pdfIn PDF document text
    • http://cloudinfo01.smartevolve.com/images/ckeditor/files/finugob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=among+you+free+playPDF 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_off00010c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C74 10536 bytes
SHA-256: 1b6e064238e487199e925413f0b70e26c872a42ef278a8b84cac96ce7d183936
font_01_sfnt_off0001247b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C8D 18576 bytes
SHA-256: b1002446ef4599a65dc9ccad26556a7e9ad3a9a546f97b35744463e6e5ff5ca5