Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee593fd9981e443b…

MALICIOUS

PDF

80.9 KB Created: 2021-09-16 18:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1fc9b365422dc1bc162072e4e606c248 SHA-1: a9500b9194e861794eb51c3b06720e90977df62e SHA-256: ee593fd9981e443bdf559f165e946af0bc5d55dc7052846d870902303e345336
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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 https://infrive.ru/uplcv?utm_term=fifa+12+obb PDF link annotation
    • http://rmgoals.com/userfiles/files/38397975122.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/86168547241.pdfIn PDF document text
    • http://wakabaeducation.com/userfiles/file/1825023324.pdfIn PDF document text
    • http://tavio.su/files/file/nugevenenixifizoxaj.pdfIn PDF document text
    • http://naso10.com/userData/board/file/pafarolalujeke.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/zenidixosijareranixewik.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/16606489486.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/tewesesonujalodezipumoket.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/a1cf95e17716dfc5f4d5419b028e6ba3/tigazugidafubiwamikuxaj.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/64052789054.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/70552642352.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/80298418882.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/14854498221.pdfIn PDF document text
    • http://dinhviht.com/images/newtech/files/40238552906.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/49245530518.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/lipilujuwodutagog.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/11804541229.pdfIn PDF document text
    • http://sukhonthip.com/file_media/file_image/file/61304520385.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/50960332189.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/gavujig.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/6a1559572ebe8e3501727b58e1230360/86176044391.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/gebedo.pdfIn PDF document text
    • https://mediacentre.aerlingus.com/js/ckfinder/userfiles/files/wuzawunuz.pdfIn PDF document text
    • 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_off0000da3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF251 17804 bytes
SHA-256: 76e8378d96e0444981931517f3a6ff69d9990b58d13c76d5e027861fc2247c5b
font_02_sfnt_off0001203e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203E 9848 bytes
SHA-256: fb12631a07854c61407ebc72839ec454ee1e14f09de219432418912377b38a12

Open this report in the interactive analyzer, or submit your own file for analysis.