Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e386735d910836d…

MALICIOUS

PDF

84.6 KB Created: 2021-09-20 05:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 219b233eb1ede2a89124c45d31e6b56a SHA-1: 154b2bd2a543c4e02a8f16bf3080838ad200d5c9 SHA-256: 6e386735d910836dfde428a8d292730de52042d10faa72644f2006963ffc6c4f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics identified numerous external URIs, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and the presence of many external links point towards a phishing or malicious content distribution scheme, potentially using embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://campermagazine.tv/public/file/vokewikugipoguxosepafifog.pdf In PDF document text
    • http://fotostudiovaccari.it/userfiles/files/42758192927.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/vagigaluzuratomusabux.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/47830227691.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/13429322657.pdfIn PDF document text
    • https://thietbixaydungcantho.com/canthomobile2/public/images/sanpham/files/fuxez.pdfIn PDF document text
    • http://med-os.com/user_upload/file/doguweme.pdfIn PDF document text
    • http://hainfelderteich.at/saseguzo.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/doropisiw.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/gonetorufiputetovebalel.pdfIn PDF document text
    • http://videlec.be/ressource/file/25607114289.pdfIn PDF document text
    • https://dom-titan.rs/files/gibafajifixubi.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/70445100697.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/71812611847.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/fubirajabamosoweb.pdfIn PDF document text
    • https://anjingliar.com/contents/files/kokuvunikefawado.pdfIn PDF document text
    • http://dekobonner.de/userfiles/file/5528884170.pdfIn PDF document text
    • http://adwokaci-pila.pl/userfiles/file/zawidosubojivexobabez.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/sedeg.pdfIn PDF document text
    • http://www.julietlandau.com/fckeditor/userfiles/file/rupagagapojutakakejuno.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce1ad2ca07---vefuzozapitifoj.pdfIn PDF document text
    • https://lideregitimpaketleri.com/calisma2/files/uploads/43890011129.pdfIn PDF document text
    • http://marchmontnews.com/imgs/file/sufazetu.pdfIn PDF document text
    • https://sierrainstruments.cn/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/85646104222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=edit+and+crop+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_off0000ec44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC44 16032 bytes
SHA-256: c838bfea0f619304c2d2a0b851e4f8a36ed76776a94e0ad9876089b9136eb1f7
font_01_sfnt_off0001158c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA3 10248 bytes
SHA-256: 138d499aee98e435b3be7e995e9ad2eee63f9d4a1f29aa20fa09ebb87499b36a

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