Malicious PDF — malware analysis report

Static analysis result for SHA-256 573d248c337a3f97…

MALICIOUS

PDF

69.3 KB Created: 2021-09-30 16:35:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4105c0d65e55d666e60cd8338079db14 SHA-1: 152016a4f473104c66154290290ed6271e03490a SHA-256: 573d248c337a3f97b8435d7ab35603007160a72d5311789939abf0809c9950c6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, indicating a phishing or malicious download attempt. The 'Image-only document with action trigger' heuristic suggests a lure where a screenshot hides clickable malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a compromised site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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 69 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://nomylo.ru/uplcv?utm_term=rich+dad+poor+dad+in+marathi+pdf+free+download
    • http://vibratingsieve.com/d/files/rafimexenavitiwobexi.pdf
    • http://jor-agric-aqua.com/user_img/files/68987897498.pdf
    • http://ukonlinedirect.com/userfiles/files/56669458001.pdf
    • http://exima.kr/userData/board/file/dexanivowilebaj.pdf
    • http://ventss.ru/userfiles/files/89261435262.pdf
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nupunu.pdf
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/mabafabaxipikibi.pdf
    • https://ceccarmehedinti.ro/userfiles/file/wipaxexipotunekobukuwabol.pdf
    • http://enjoy.sk/editor_uploads/system/files/vatojafusa.pdf
    • http://golden-candies.ru/webroot/files/files/26109654131.pdf
    • http://stellar-toys.com/ckfinder/userfiles/files/xudopijumunavujenox.pdf
    • http://phulieumaymacbaoco.com/hinhanh_fckeditor/file/modegasanisikulokumamotes.pdf
    • http://geometracosentino.com/userfiles/files/83452137794.pdf
    • https://imahima.xyz/js/ckfinder/userfiles/files/72455471133.pdf
    • http://raegcafe.com/uploads/files/73847451285.pdf
    • http://www.jindatunnel.com/up_files/file/gedovevofinikipanifogar.pdf
    • http://houselandia.ru/files/rojudinefixilikelaka.pdf
    • https://miet.hu/kepek/texivojuxodapefi.pdf
    • http://pooq-design.com/app/webroot/fckfiles/file/denokaxiv.pdf
    • http://ceramvetro.net/userfiles/file/fonakadadubukob.pdf
    • http://kleni.cz/userfiles/file/46074025099.pdf
    • http://trip-sale.ru/userfiles/file/26943182337.pdf
    • https://anandalaya.in/resources/file/xenelevufafizavoki.pdf
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zazibelenonidamixoxupife.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/q3l3drugej3fmfgktj1acj7tv7/88180379033.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/o99blofj6gjsr43o52scrtk59d/rodadiruterulemuzosutus.pdf
    • http://noithatmyhome.com/img/files/naxizowajoxojoviti.pdf
    • 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_off0000b2fc.bin
cadf941a94c266562c812b67322a7ad9faaecd6c13050b36c2494046461acd54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FC 10848 bytes
font_01_sfnt_off0000cbe2.bin
f384229ef726e672bdd1a85d88bd2b1d8f4860fbaf923c0e1d7b350e3a33be94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE2 14260 bytes
font_02_sfnt_off0000ef23.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF23 16792 bytes

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