Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d94bd6ed35926c…

MALICIOUS

PDF

74.9 KB Created: 2021-09-23 06:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: acec7876f105da4543ebb51c64dc0bb0 SHA-1: 759ef45458c7de7e448e2325413391812048703d SHA-256: b0d94bd6ed35926cd43657c91712692f8bc1cdfaac2b3847079c6b32e87e4378
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it's designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a link farm on disposable hosting, commonly used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://lammensfilip.be/uploads/files/43079299600.pdf In PDF document text
    • http://soosanfix.com/upload/fckeditor/file/wofizekurixa.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147fc00cce40---pogexufewevuvifegegewa.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/61579748105.pdfIn PDF document text
    • https://karaari.leaddeehub.com/userfiles/files/jojilesulenupival.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/piwujolebazuje.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/74827113042.pdfIn PDF document text
    • http://icbiz.ru/userfiles/file/pogufe.pdfIn PDF document text
    • http://belovosushi.ru/files/78966803185.pdfIn PDF document text
    • http://cserepakciok.hu/xdata/file/gekatiman.pdfIn PDF document text
    • http://elektromig.pl/userfiles/file/84498192885.pdfIn PDF document text
    • http://isspskola.lv/userfiles/files/welam.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/64124922981.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/45567842914.pdfIn PDF document text
    • https://insp.biz/img/file/82653106652.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents/files/18620387757.pdfIn PDF document text
    • http://guchen.ru/d/files/849971436.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/4299194976.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/gozubalok.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/nudagitip.pdfIn PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/95989727987.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/zunasatorikimetowuterut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=pirate+bay+2021+proxyPDF 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_off0000c2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACF 10580 bytes
SHA-256: e00c0becb2dc95871b60babd144b565df6354fbf1a8c4d6f30cf3a15ccf22089
font_02_sfnt_off0000f2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FC 16916 bytes
SHA-256: d1c5e39a4b5e988269cd569643ef6c32785e581fe9876e4bcf51e33bf0ea9984

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