Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb47e4329f5ddef1…

MALICIOUS

PDF

99.5 KB Created: 2021-07-14 00:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0a8003652ab0a0baad9e1bea745b5b94 SHA-1: 5a08b96014e34efbc5f2bd14b17fd1e06ac4ce41 SHA-256: bb47e4329f5ddef1d9e6fdf1d26969afb0302ebb3e3083ec3e80b2f19dced0af
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple domains, many of which are likely compromised or disposable hosting, designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests an attempt to direct users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://liccuza.ro/stiri_files/file/44468276092.pdf
    • https://dadesigning.com/daduserfiles/files/nagowede.pdf
    • https://alakharia.com/public_html/userfiles/file/97504647710.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3dff4ea577---14729328637.pdf
    • https://ludifrance.fr/userfiles/file/13612430145.pdf
    • http://beergolfers.com/blog/images/file/vuzinisa.pdf
    • http://ciaooo.ru/uploades/userfiles/file/733480681.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/ce4380310747916a2e9006dfe8173426/pamaja.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/i00ij2b3ji7qh9qq90s546g33u/vasitosopuziperona.pdf
    • http://delannahotel.com/user_img/file/lijemipug.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a983abafa4d---62068725969.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c9dea2aeb7e---repajaw.pdf
    • http://alnoorcity.com/userfiles/file/tenanovilegu.pdf
    • http://aurora-c.jp/files/files/63844081028.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/il2v6k0b2nej8jk63p63aee444/76212381366.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bebef113455---88988535748.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4cc358fc6---46865582047.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1bf2150c7---42304364784.pdf
    • http://alhouti.com/userfiles/file/safozexotinip.pdf
    • http://gayaarchi.com/userfiles/file/20210703104919.pdf
    • http://agt.es/files/galeria2/files/11658582950.pdf
    • http://ahxxzx.com/userfiles/202105/file/potabufubexonibivebuxuv.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/16dfc9c7194acf7e143746e339826f5c/72562799034.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+write+an+exponential+function+from+a+graph
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d99.bin
d4ef890a8ff59b0927c9a641f374989317535dae8c501a625adb08de04ffb0c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D99 17852 bytes
font_01_sfnt_off00014cf7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CF7 16792 bytes
font_02_sfnt_off0001650e.bin
f0ab8aea96ac1ccb58398a4b92852b74ba61ab41ca76f415bffdf8b433c852cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x1650E 11040 bytes