Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b2f5b420355a7a…

MALICIOUS

PDF

73.4 KB Created: 2021-09-25 01:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e910e1cb556dccfa0281d52384dbcd28 SHA-1: fcfc101c4f2ec02d8642720c87c4fd228ee217f6 SHA-256: 96b2f5b420355a7a31e141d865f4a5e6e3ae57606c3b53262b51f1422eab4580
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect users to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to T1059.007, and the nature of the file suggests it was likely delivered as a Spearphishing Attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mimpiindah88.com/contents/files/kefiporujobepepenamusese.pdf In PDF document text
    • http://chinhsuasolieu.com/media/files/67952056285.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/luganobazetop.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/71133158562.pdfIn PDF document text
    • http://xn----8sbkebltdkywd.xn--p1ai/ckfinder/userfiles/files/96203549522.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/robuno.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/51221234801.pdfIn PDF document text
    • http://birdwatching.sk/media/file/55821321485.pdfIn PDF document text
    • https://eurouniversal.eu/ckfinder/userfiles/files/44865918389.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/a340297fd8ffc2ab0640e3a5ce66e54f/guxibarefokasofogasum.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/murojifutixanafarune.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/fawobirek.pdfIn PDF document text
    • http://sccsfz.org/upload/2021-09/rezaguvofirem.pdfIn PDF document text
    • http://all-vehicle.net/js/upload/files/bazegabawapuvilokeporore.pdfIn PDF document text
    • http://rkenterprisesonline.com/FCKeditor/file/38864505061.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/fujukigasinenadopefeb.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/topokageva.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/matefupaladetezu.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/20303667879.pdfIn PDF document text
    • https://www.bankkartya.hu/js/ckfinder/userfiles/files/52030978178.pdfIn PDF document text
    • https://lordoptika.hu/files/files/23030652343.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddbc300f59---dagetukol.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/26311251348.pdfIn PDF document text
    • http://showdoimovel.com/files/files/pibolutesekewiloj.pdfIn PDF document text
    • http://gazetavk.ru/img/file/rabejipigatifep.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202109090254214128.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=download+lightroom+androidPDF 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_off0000b9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E4 18012 bytes
SHA-256: b66440270be13aadde7bba9d367997a2b81bba220028a82129dd6c2c6d922b5f
font_01_sfnt_off0000e85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10072 10480 bytes
SHA-256: 694c0716ed16a075dfe8167723667f783cf5258af5db4a0d6dec78d815197aa8