Malicious PDF — malware analysis report

Static analysis result for SHA-256 417302412c15994a…

MALICIOUS

PDF

69.1 KB Created: 2021-09-26 03:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1c95ec309f01dc97ff4e4b70f1c92633 SHA-1: 823168a90b213c6722b019c7583cbb3d7fcf892d SHA-256: 417302412c15994a5cf68344a9ae02f0af26bfc024dc79125d4d94e0038a1336
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was identified as malicious by ML classifiers and ClamAV, with a critical heuristic indicating it is a phishing trojan. It contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting, suggesting an attempt to redirect users to malicious sites. The PDF structure and embedded content indicate it is likely used as a lure to initiate a phishing attack or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://zlato-invest.cz/upload/files/65268460217.pdf In PDF document text
    • http://garageanything.com/js/upload/files/zodetefasidinemudafefotu.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/12489746293.pdfIn PDF document text
    • http://diepdoanhmetals.com/media/ftp/file/ritegow.pdfIn PDF document text
    • https://playindiano1.in/ckfinder/userfiles/files/kabuwuwiliwituni.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a505977ba---wetujebuvowinagakul.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b2dd1a578a---22604614178.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/4739275411.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/tesipubutubomerivimoba.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/taturikepanojowedepibe.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/88394787967.pdfIn PDF document text
    • https://wojczak.pl/userfiles/file/watilenetaxugaputibefo.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/50426358280.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/jobaruviwabonosakalebe.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/gobanejibinaviman.pdfIn PDF document text
    • http://sun-tes.ru/files/file/begixud.pdfIn PDF document text
    • https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/geputopiresasuronubi.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/pewanadafa.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/36217354079.pdfIn PDF document text
    • http://m2m2design.com/userfiles/boniwewivov.pdfIn PDF document text
    • http://saveursetsavoirs.fr/image/file/85168345059.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/91335117870.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/fusuvufamusufikokeju.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/vipovewubo.pdfIn PDF document text
    • https://taybaite.com/userfiles/file/nigorigejariwevofadoduzij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+do+i+find+my+hotspot+password+on+my+android+phonePDF 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_off0000b124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB124 10908 bytes
SHA-256: 02ce854766b51ba852301bd2be15650e0049a94c1a28c8d1ee0923276a8b9480
font_01_sfnt_off0000ca3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24F 14424 bytes
SHA-256: e4af48333b1e804e6f19e353844b9d2f25cf8dd49e9ffd8cdffd04cef56bae6a