Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd2ba047f5cd225…

MALICIOUS

PDF

70.2 KB Created: 2021-09-26 13:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 85de88a7008f8d27c6f5d1daad6e978a SHA-1: 0483078aeb1324e25a0e52459f13000708b85b14 SHA-256: dfd2ba047f5cd225e1b16d569c24233f6013c25c10876c5f82ea3eb00925269e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • 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.
  • 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://saikekanglun.com/filespath/files/20210912031444.pdf In PDF document text
    • http://h04ydivan.ru/userfiles/file/72266876479.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/22052391891.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/161394d35458bd---47679851324.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/vonevudadoki.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/1219970928.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/97173966274.pdfIn PDF document text
    • http://uralteplostroy.ru/content/file/bomewowolawijitalubebe.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/rebujuwapomosot.pdfIn PDF document text
    • http://irfanmakina.com/depo/sayfaresim/file/xupelidapokazetegebexege.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/6423779676132ab26417bb.pdfIn PDF document text
    • http://mos-craciun-inchiriere.ro/fckfiles/file/misito.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/33118143048.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/falegemofusixamuwu.pdfIn PDF document text
    • http://vonschickenfremont.com/uploads/files/99976445726.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/22691360902.pdfIn PDF document text
    • http://smingames.com/ckfinder/files/94390426960.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b798a7646c---71921320657.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75013471165.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/wuluseparejupojo.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/sojilarekenirur.pdfIn PDF document text
    • http://signauction.net/userfiles/file/19666894496.pdfIn PDF document text
    • https://lifeteacher.tw/uploads/files/202109092229373926.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=planets+in+order+including+plutoPDF 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_off0000b21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB21B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2D 15600 bytes
SHA-256: 71fd0a9f9b30243531e13c3db0bae38facce4e77ded09b84ade86db058972679
font_02_sfnt_off0000f221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF221 10788 bytes
SHA-256: 6af21b7ccec50754c70aa2d046dd56ac8e43582f4e7caf47aaf93744b68efe06

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