Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb7d90c874f13ba…

MALICIOUS

PDF

89.6 KB Created: 2021-09-18 22:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0fc05b4f826f0209e79b82f1b416ba59 SHA-1: 5ce2132a87252f750da18aa14dbc2ad2714b0e90 SHA-256: fdb7d90c874f13ba8b0d5a835de8c3d7aaf42a68a471b17b1f681dc41c767a7e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The primary URL, 'https://garglob.ru/uplcv?utm_term=joker+full+movie+123', suggests a lure related to popular content to entice clicks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://garglob.ru/uplcv?utm_term=joker+full+movie+123 PDF link annotation
    • http://silesiacapital.eu/data/file/49376835477.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5e176151e---8453154636.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/zojuzivuvobopasamolozilij.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/wexujanozedoxixa.pdfIn PDF document text
    • http://metallpress.ru/files/getudiwupijikovip.pdfIn PDF document text
    • http://gzky.cn/dubeite/ckfinder/userfiles/files/20210910_234939.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/44514845326.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613498647ae23---96162616748.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/susabatagitagolesusibod.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/57641225723.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/1899939566.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/73957193215.pdfIn PDF document text
    • https://empresa-venta.hr/files/12592189678.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/mifalusut.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/90390161963.pdfIn PDF document text
    • http://novafish.it/userfiles/files/kezusukunewimakapuvo.pdfIn PDF document text
    • https://pactforfamilies.org/ckfinder/userfiles/files/gewav.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/39920182414.pdfIn PDF document text
    • http://rebeccaosborne.com/uploads/45065692168.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/16828908329.pdfIn PDF document text
    • https://newcar-rental.com/uploads/files/202109150221171045.pdfIn PDF document text
    • http://melodylavernebettencourt.com/media/file/takeka.pdfIn PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/24590587809.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/14540490979.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_off0000f626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF626 10436 bytes
SHA-256: 7d2b2e57d55bae03e1e2877951ba5dfff3640679feb361df245df32ff2618191
font_01_sfnt_off00010df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF4 19452 bytes
SHA-256: c8c3557bd2ee70b412c754be439c41691fd4d444073ee51fecf90e65794f96b1
font_02_sfnt_off0001409e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1409E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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