Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd35010182abe863…

MALICIOUS

PDF

67.7 KB Created: 2021-09-28 10:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 60ff539da142a0676754c63d6b80a6b5 SHA-1: 5d2bf21711395c1e117dd5200f84d9ae99a39a43 SHA-256: dd35010182abe863b10ede5758e051d1532a9868852e11a9fe9b04a3de6a0d7b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and is flagged by multiple heuristics as a phishing lure. The document's structure and size are typical of an image-based lure designed to trick users into clicking a link. The embedded JavaScript likely facilitates the redirection to malicious URLs, as indicated by the numerous unknown reputation URLs extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://www.singaporemedicalclinic.com/ckfinder/userfiles/files/xodudaba.pdf
    • https://tcremich.lu/files/files/xiribup.pdf
    • https://rhuyscampingcar.fr/images/files/2816720422.pdf
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/vilivulezukozosipofodala.pdf
    • http://poddertradingandindustries.com/userfiles/file/2792315782.pdf
    • http://eichler-kammerer.de/nazarimenidojunaka.pdf
    • http://terezmisszio.eu/files/file/dubufesafeneritaf.pdf
    • https://esperanzadeavila.com/fotos/file/65313944555.pdf
    • http://www.dean-cpa.com/files/adminpic/file/94006060060.pdf
    • http://xn--76-6kca8aqc6c.xn--p1ai/pic/userfile/zukuribarus.pdf
    • http://ameshamagazine.com/js/upload/files/pivivifuriwunanejum.pdf
    • http://mwflower.com/upimagesfile///sabiseduker.pdf
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kigutusumabepomevorunu.pdf
    • http://baohanhranghm.com/upload/img/files/woxagusumunaz.pdf
    • http://microcement.ua/userfiles/file/46761167381.pdf
    • https://tims.ro/ckfinder/userfiles/files/ramusaje.pdf
    • http://kayamedbursa.com/userfiles/file/90403629914.pdf
    • http://ardeche.proximeo.com/ckfinder/userfiles/files/3370907242.pdf
    • http://chanhbon.vn/media/ftp/file/xoxapomuponunidexovezenil.pdf
    • http://bolt.fo/public_html/userfiles/files/wujasik.pdf
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/60664343295.pdf
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/62897334352.pdf
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/18460165605.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=euphoria+full+episodes+online+free
    • 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_off0000acdb.bin
fc8075af53a9bae1c08caf8d9660ffc3d317642f7122ed8ad41c0010e408d59b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACDB 10580 bytes
font_01_sfnt_off0000c4da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DA 16792 bytes
font_02_sfnt_off0000dcec.bin
b5fbbe1de94090aa97d87ca36b75d554d6faa7ede8fac0b47d9372b29f1f80fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEC 14056 bytes

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