Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d277047c87e6839…

MALICIOUS

PDF

74.0 KB Created: 2021-09-19 06:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2fa0dec9b873dd4a897c29efc95efb4e SHA-1: 93514cfddae5a98f258813d31eaac59fdfa59866 SHA-256: 7d277047c87e683999205338918481eaa24e1edb684235b6728cc69c34c21803
154 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous external URIs, including one pointing to a raw IP address, suggesting an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://zawodydrwali.pl/app/webroot/userfiles/file/nikisufejojigu.pdf In PDF document text
    • https://nicklason.se/ckfinder/userfiles/files/gubuwimerun.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/vaturufujigalutesozivi.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/valiwum.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63832832579.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/wivaje.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/xujinupo.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16131f4aaa7940---35100150269.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/vajudibi.pdfIn PDF document text
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jovuxefimubamopoles.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/71453341923.pdfPDF link annotation
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/88192498187.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/5758163808.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/21740477284.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16145e2f227716---loneborin.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/pelesemunurubipanu.pdfIn PDF document text
    • http://spokoino.ru/i/upload/files/fubilozaxiralojefug.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/bobapunetameni.pdfIn PDF document text
    • http://www.bash.cl/media/file/vukipanupase.pdfIn PDF document text
    • https://eguiders.com/uploads/86501249292.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=a+bug%27s+life+putlockerPDF 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_off0000bba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA7 17696 bytes
SHA-256: aab82567868be373d7e0787c38a984e37a5ed73bfd3b9e5991672c47509a02fb
font_01_sfnt_off0000e90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10123 10736 bytes
SHA-256: a1b735a23af15adfc091b0460b8dea3307ae9205afc9269c3815a676d9265450