Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69f70c6094ee08a…

MALICIOUS

PDF

68.9 KB Created: 2021-09-27 15:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4182cf5110e4992923f54f31dfa87527 SHA-1: 24cdf8828f6a3ab298ce061b2dd90af350bba3cc SHA-256: b69f70c6094ee08a03e51e3a0a5a692712c767dee15d51682a491df6febc26b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and presents as an image-only document designed to trick users into clicking an external link. The document body is heavily obfuscated, but the presence of embedded JavaScript and the PDF_IMAGE_LURE heuristic strongly suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 68 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 http://congtyvima.com/images/Download/muvizixalamama.pdf In PDF document text
    • http://hkbroadwin.com/userfiles/89435838775.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/29446609191.pdfIn PDF document text
    • https://konyaalotaksi.com/userfiles/file/61035222383.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/nenav.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/53719326816.pdfIn PDF document text
    • https://starfoil-mail.nl/uploads/wysiwyg/fipesazupezikenati.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-9-25/20210925164323584742.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/51278393152.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/ljk5dvirijkm7re066var30eln/fabopevo.pdfIn PDF document text
    • https://www.douggoodkin.com/admin/ckfinder/userfiles/files/75608871597.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/80650158052.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/sigoj.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/25770248087.pdfIn PDF document text
    • https://fgcrubochi.com.ng/ckfinder/userfiles/files/88717382848.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/86487488566.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/50053147999.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1632241516.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/18912165500.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1613025709b31a---64393427548.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7427080b8---45708129847.pdfIn PDF document text
    • http://permagnet.com/upload_files/file/21092415254859558803ntug.pdfIn PDF document text
    • http://zeamailer.zeapost.com/FCKeditor/editor/filemanager/connectors/userfiles/file/zonupojomaxebetib.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/susawilibuvetenika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=what+is+the+ram+of+my+phonePDF 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_off0000b296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB296 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000caa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA8 13972 bytes
SHA-256: 02b13e3639e52a21bca6ae769dc2e85c67c5a60ea74ef876596a7966ae7e1b10
font_02_sfnt_off0000ed46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED46 10684 bytes
SHA-256: 305dc22e88e0416c007d712f29583e378669fc1c15534cf7d7be2f1f3c9e893a

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