Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c360f0efb8dc69…

MALICIOUS

PDF

67.7 KB Created: 2021-09-29 02:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 249cf0799a6be2b68720c848e8d4eddd SHA-1: 9c8c3c244936c851fa2517d2d5743eb6078ba956 SHA-256: 47c360f0efb8dc69ed0a848796a199fda02136185e0c34255796b85b3f0f63fd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, employing an image-only design with a click-outward action to redirect users to external URLs. The presence of embedded JavaScript and numerous external URIs, many hosted on disposable domains, strongly suggests an attempt to deliver a malicious payload or phish for credentials. The ML classifier and ClamAV detection further corroborate its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://orsam.org.tr/paketler/ckfinder/dosyalar/files/rejowewopopakebuma.pdf In PDF document text
    • http://silverspringabw.com/uploads/files/56782210856.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/31685310284.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/23b665146cf33aeeddb8e3f0aa593356/16677513838.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/5831661783.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/datolu.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/23578834023.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/99649936590.pdfIn PDF document text
    • https://hobbyschuurtje-webwinkel.be/images/userfiles/file/botewukosimagoritipero.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/gepofu.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/luwepez.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/mupuxesagopefapego.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/6604509878.pdfIn PDF document text
    • http://goldenstarhotel.vn/images/uploads/files/gufotezeru.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/vuxoweguzub.pdfIn PDF document text
    • https://thietbigas.net/media/files/fivamegesexewomekav.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/jonupigetisapirukaku.pdfIn PDF document text
    • https://ppkh.net/userfiles/file/14093958810.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/59957052792.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/33653022568.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/wudowusodupubetifiv.pdfIn PDF document text
    • http://goldsunjsc.com/upload/files/jefiragim.pdfIn PDF document text
    • https://noventa.cz/media/files/file/ralapesinitagukasug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+do+i+put+music+on+my+sd+cardPDF 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_off0000acef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACEF 14244 bytes
SHA-256: 704db28da7aae10ac9d27500a5a397bcb59051f49189714859820cadea70fe62
font_01_sfnt_off0000d0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B9 10788 bytes
SHA-256: 73a0eb99977c2c95eccc1df7d607b50cf93012765161a2d5dfe16a9847e69e62