Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1552c2b97d64676…

MALICIOUS

PDF

81.1 KB Created: 2021-09-23 16:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c1649887e442f1e7f5188fc615a79c35 SHA-1: 40c34c1d76172bced4d4340d071cb8019181d88e SHA-256: b1552c2b97d64676363a4c8e0863a94aa9a90e5b70b6c6482f281f1d25f4e74d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting users to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://laborke.ru/uplcv?utm_term=china+led+tv+price+in+pakistan PDF link annotation
    • http://qapoll.com/2015/vat/upload/files/rimobodapilodizisoseg.pdfIn PDF document text
    • http://wimborst-ceramics.nl/ckeditor/ckfinder/userfiles/files/86220824863.pdfIn PDF document text
    • http://khmim.com/ckfinder/userfiles/files/xamabam.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/tikugivozufedapubifaxil.pdfIn PDF document text
    • http://shoreluxurylimos.com/userfiles/files/25195494908.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210914_12751976545ACC92.pdfIn PDF document text
    • http://uts.edu.co/portal/app/ckfinder/userfiles/files/81181799308.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/94377861537.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/17849016545.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/fewafafigasilibewo.pdfIn PDF document text
    • http://byecook.com/ckupload/files/rofik.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/vavetejugejesokudox.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/welojifozidogam.pdfIn PDF document text
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/41694441568.pdfIn PDF document text
    • http://cabini.it/userfiles/files/24600867972.pdfIn PDF document text
    • https://wheelmartthailand.com/image/upload/File/wijizuroverifitavuki.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/20956673814.pdfIn PDF document text
    • https://nasikampung.info/contents/files/saxazufaxuxusawumexivo.pdfIn PDF document text
    • https://mgrenginiai.lt/ckfinder/userfiles/files/27209710887.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/baxaxajikutam.pdfIn PDF document text
    • http://transporteslaplata.com/imagenes_web/file/zisil.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/jagojilakesidunexiveg.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/dojavazevunatofazakojowi.pdfIn PDF document text
    • http://leeandrewdavison.com/download/4020829421.pdfIn PDF document text
    • 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://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_off0000d965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD965 17864 bytes
SHA-256: 692a10e0f487aef681731bf3d2e851e0945e19a1efdd0e99f4878646c2241a70
font_01_sfnt_off00010820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10820 10680 bytes
SHA-256: 81f2ecfef1db620b44a53606bf73c1c37c9bd382095e3484bf3604be851026db
font_02_sfnt_off00012095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12095 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.