Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b38cf686c1f536…

MALICIOUS

PDF

80.9 KB Created: 2021-09-08 21:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ff86f49359c05ce4a287f3bfcaf77f09 SHA-1: ef8da693d9830ee39dbef9a14838385208c08d61 SHA-256: 00b38cf686c1f536e7e3463b648f7a7a6948d550b5c543184e881a1d1143298d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to potentially disposable hosting, suggesting a link farm or redirection mechanism. The presence of embedded JavaScript, though not explicitly detailed, is a common method for executing malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://www.itidharamshala.in/images/uploads/files/vosamukibibo.pdf In PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/64350032265.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/94923860673.pdfIn PDF document text
    • http://robfredo.com/userfiles/file/sezanuwezox.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/kixezakupisukus.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/161341e6dc8e8b---golarixokerunulokutopaf.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/likatowugusifozunawuzikaw.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/gefusefis.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/15194865193.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/4db05d8e92a0a4dfe05fbefdf7a8658f/66704470203.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/viwogereju.pdfIn PDF document text
    • http://electric-kernbichler.at/70630906274.pdfIn PDF document text
    • https://ibshospitals.com/userfiles/file/sopekoxep.pdfIn PDF document text
    • https://alident.centralcms.cloud/galeria/files/15631077833.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/96402318972.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/32694371481.pdfIn PDF document text
    • http://renknh.com/ckupload/files/widagegoluzanu.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/puguwivaxabusufudalo.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/roxolovokixurinawov.pdfIn PDF document text
    • https://ratodua.com/contents/files/78443777307.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/dimojo.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/35627103551.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/15256292988.pdfIn PDF document text
    • http://www.heksan.com.pl/file/66827725109.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=july+month+current+affairs+quiz+2019+pdfPDF 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_off0000d213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD213 18420 bytes
SHA-256: db9b611222777ad6b951bbe297efb54c85bf886eccbb11c26582bcaf2503331b
font_01_sfnt_off000101c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C5 11760 bytes
SHA-256: fa7adfb53ef879c1aaeb49719df26faf66b7f7d168cfdafb998ebaa3171106d1
font_02_sfnt_off00011d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1