Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3be00f528fd7587…

MALICIOUS

PDF

73.2 KB Created: 2021-09-28 15:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 36c2bedf471ad8af347ca3528361b51c SHA-1: bbd56f4d6f26955d53ed22a30fc4654511206b47 SHA-256: e3be00f528fd7587eacbe0c42084b5df6b0f529bf1a1a2821d0b72784175e4d3
154 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojan delivery mechanism. The presence of JavaScript points to T1059.007, and the overall nature of the file suggests it's delivered as an attachment (T1566.001) and likely exploits a vulnerability for execution (T1203).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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://energyexcess.com/userfiles/file/43837288354.pdf In PDF document text
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/sokaluniwagu.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/viderewixokewatuxu.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/vekotitejukolemufubukiva.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/kibezejor.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/202198444156038.pdfIn PDF document text
    • http://xinxinhouseware.com/uploadfile/files/46665310042.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/161489ec9aa60c---xejizaxuputibawexare.pdfPDF link annotation
    • https://lombardpruszkow.pl/local/userfiles/file/76080879964.pdfIn PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/30296261423.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/fovepumixuxekaduzurumij.pdfIn PDF document text
    • http://heatherjansch.com/ckfinder/userfiles/files/xajivenurukinirumat.pdfIn PDF document text
    • https://akvanova.ru/sites/default/files/vifosedoler.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/mrfpq62b1omjrq3sr8gt6gtbm4/50119398476.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/rukuliwasetoradobi.pdfIn PDF document text
    • http://re-media.ru/foto/ck/files/87922934777.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/vugopapadavuvifabin.pdfIn PDF document text
    • http://esistore.be/userfiles/file/gewede.pdfIn PDF document text
    • https://998.geektic.com/geektic/files/kifidibaj.pdfIn PDF document text
    • http://audiohrestomatiya.ru/content/file/97797752769.pdfIn PDF document text
    • http://ciaomamma.hu/editor_up/29053925618.pdfIn PDF document text
    • https://webmenuplus.com/images/file/ditoxaboz.pdfIn PDF document text
    • http://industrialdevices.in/uploads/68377801195.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=can+a+business+account+on+instagram+see+who+viewsPDF 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_off0000b62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB62B 17688 bytes
SHA-256: 8d0437dfb7c88f4d423a9915edf1d2acaadce51bb1f866c58476fae12f863808
font_01_sfnt_off0000e31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31A 11052 bytes
SHA-256: 535086bd3885bcd7e1b7a001bdaef5cd1e286006e334498279eda4a060d344b2
font_02_sfnt_off0000fcc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1