Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52eeb52d8f526ec…

MALICIOUS

PDF

68.1 KB Created: 2021-09-27 21:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b4788bf951b98804a17f6f6d5e0f9953 SHA-1: eb06e39d596e6451d328556952140c4d5a55b8c0 SHA-256: f52eeb52d8f526ecefef9c371b6e57acf3d192394138a92ca1705ed7780c5860
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains an embedded JavaScript stream and is designed as an image-only document with a clickable element, typical of attempts to trick users into downloading further malicious content. The document also functions as a link farm, directing users to numerous external URLs, some of which are hosted on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/99fd112a92c938a8ba7d916c72df33ac/58736696417.pdf In PDF document text
    • http://qdjshg.com/files/file/kagikubonu.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/94579201992.pdfIn PDF document text
    • https://branpc.in/ckfinder/userfiles/files/51835808861.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/simoveveveteposesoruziri.pdfIn PDF document text
    • http://serenetour.com/image/upload/File/jibirujisakoxu.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/diler.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/fibev.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/watemud.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/56976818465.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/pudakiga.pdfIn PDF document text
    • http://battle.bpv.su/content/files/files/39798100437.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/36307163996.pdfIn PDF document text
    • https://lawtutors.co.uk/js/ckfinder/userfiles/files/fazix.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16142713226367---gedobisavibawixu.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/10711143094.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/45141887605.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/rigoxelikabitoro.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/pomapuwixosopelawap.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/fixugefemirudipegefomimeg.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/tibamowizoruveloke.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/35184499435.pdfIn PDF document text
    • http://www.miwon.com.vn/app/webroot/uploads/files/vujegilepokav.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/kirajinidofet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=nba+2k20+free+download+apk+and+obbPDF 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_off0000ae89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE89 14292 bytes
SHA-256: 82debbe5a8e8c88aafebc8eb713fd52784f9986b25f9b5bd02ee1d3eb03d08c0
font_01_sfnt_off0000d25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25A 10668 bytes
SHA-256: 4c847bdf91ea05f9a21cc1e58719e789214ec9bd794763b3292cc231b6d242c6
font_02_sfnt_off0000ead6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1