Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc1ebed1199b2e9…

MALICIOUS

PDF

70.7 KB Created: 2021-09-29 04:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 05a2ba93a7c712d73678c419089a0235 SHA-1: e01f0093f655ab4c775106c1d421d30144619f57 SHA-256: 9dc1ebed1199b2e98b8ece503bbd781984f845ea474af35a55bcc32e547a3679
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic firings indicate the presence of external URIs and a link farm, suggesting the PDF is designed to redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly support its malicious nature, likely as a phishing lure or a downloader for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traktor-tv.de/sites/default/files/file/60649610248.pdf In PDF document text
    • https://mimpiindah1.com/contents/files/bupexaluzotumig.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/mekibowin.pdfIn PDF document text
    • http://innersolutions-uk.com/file/20546308841.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/33690606924.pdfIn PDF document text
    • https://msiutilities.net/documents/pinuzivufuwitojimelotefa.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/80848400801.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/sudidesi.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/17556055679.pdfIn PDF document text
    • http://evolution-dev.com/file_media/file_image/file/419091322.pdfIn PDF document text
    • http://lustigersteirer.at/userfiles/file/wuzesivuzokawinizogirine.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/xifiwixogobokelatixoze.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/vemorixipavubafasa.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/xejataxatedegalisi.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/zubaw.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/84078121878.pdfIn PDF document text
    • https://reformedgeneration.com/userfiles/file/fusuwerubezagikanota.pdfIn PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/xofevexalutajer.pdfIn PDF document text
    • http://gelinyuanyi.com/upload_fck/file/2021-9-24/20210924014215826175.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/2bd3f428d65fa955cd6be9fbc04e2e24/110340222.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/22984436790.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/lavejuwe.pdfIn PDF document text
    • https://camelcarpet.org/d/files/kusofimiwo.pdfIn PDF document text
    • http://vbond.hk/editor_upload/file/gogovujolabado.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/74210676103.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/29963316786.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=snake+video+for+android+apkPDF 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_off0000b195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB195 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A7 16700 bytes
SHA-256: 123e0f9534034e559d501b4bb87199267f577bfb45cd77f0fe8f0a43c64b22fc
font_02_sfnt_off0000f44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44E 10412 bytes
SHA-256: fa0d459aa708f154522389078328351081f4a91ed0f2fd7d63490e17768b1ded