Malicious PDF — malware analysis report

Static analysis result for SHA-256 10de705457c1aff0…

MALICIOUS

PDF

73.8 KB Created: 2021-09-17 03:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ea09b744237914f26b2a162d613fcb2 SHA-1: 481378e57df937dd5baeee1207c37caaba274916 SHA-256: 10de705457c1aff0f4973a1e7cb67763718b7b09eedfe8819e1dadb9c3ad29ae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded JavaScript stream and numerous external URIs, suggesting it is designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the document is a link farm on disposable hosting, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://medvor.ru/uplcv?utm_term=qr+scanner+online
    • http://eaas-journal.org/survey/userfiles/files/dojabokipakakekakex.pdf
    • http://the100voicesofgospel.de/fichiers/newsletter/file/birokoxapazegiwuw.pdf
    • https://xedulichhaiphong.vn/images/news/files/vususazele.pdf
    • http://bebelino.ru/userfiles/file/83796355211.pdf
    • http://comlark.ru/userfiles/files/84563605891.pdf
    • http://packturf.fr/files/podak.pdf
    • https://cplastik.com/data/cms/file/81578944112.pdf
    • http://naoshima-habitant.com/images/blog/file/61074671525.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e1bdabae9---41886340406.pdf
    • https://wct.goldcrownresort.com/magazine_files/files/begetudofozafesive.pdf
    • http://kolbiko.com/images/uploads/file/15881114676.pdf
    • https://congnghiepxd204.vn/upload/files/36464338485.pdf
    • https://beautydiction.com/ckfinder/userfiles/files/banazepuz.pdf
    • https://bisleri.genefied.co/ckfinder/userfiles/files/kefumalu.pdf
    • http://petrduchek.com/files/58450122036.pdf
    • https://wasael.com/userfiles/file/bijurejelo.pdf
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/7293234830.pdf
    • http://yuanhebiotech.com/upload/files/jumisalipizanijoguv.pdf
    • https://mokshadhamnepal.org/userfiles/files/29412997073.pdf
    • https://ist-lb1.istanajp.com/contents/files/67848984773.pdf
    • http://eichler-kammerer.de/luwikixatiduzozo.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16132ac41b1fcd---doxurebodex.pdf
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/5499602631.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf99.bin
7e8fb28b725e2297df1cfca4a0979771ee9a6d14fab8185c016b6fa3de5bbd25		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF99 10184 bytes
font_01_sfnt_off0000d68f.bin
5d4658a649e7c3237e1d4ad3e8896cec181d61465d9e8eb889e66a1f53d1f1dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD68F 16672 bytes
font_02_sfnt_off0001018b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1018B 16792 bytes

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