Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb3cdddf90c498f…

MALICIOUS

PDF

84.5 KB Created: 2021-09-13 03:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 59fe8fb1b487309c268f6a1f1c0ada1c SHA-1: 70d5bac68fa67b88d60158f383d7c04b1af0f003 SHA-256: eeb3cdddf90c498f1a434ad163d8e099acd11c3ea5da1149f781cf45bf9a56f7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm, likely to distribute malicious content or phish for credentials. While no scripts were explicitly extracted, the presence of numerous external URLs suggests an attempt to redirect the user to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://mondoacquapiscine.com/userfiles/files/9183509138.pdf In PDF document text
    • http://olech-rzeszow.pl/userfiles/file/1476755587.pdfIn PDF document text
    • http://hongdacable.com/d/files/ludikema.pdfIn PDF document text
    • https://motecx.com/images/file/33970064509.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/61261582840.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/pukigaposeru.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/63572443693.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/66938353121.pdfIn PDF document text
    • https://cyc-catering.pe/disac/userfiles/file/35708622342.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/papurosudutafadubavomek.pdfIn PDF document text
    • http://hastensandbreakfast.nl/userfiles/file/tigujexage.pdfIn PDF document text
    • https://www.corpeverest.com/ckfinder/userfiles/files/tasekaxawegofotekevuli.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/48888654985.pdfIn PDF document text
    • http://dogomanhnghia.com/uploads/files/96492368539.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/mopajobadubopabazawa.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/zogafaj.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/20219360443560.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/waberiwuxugukogoko.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e862a88fdb---57124863079.pdfIn PDF document text
    • http://bastola.org/userfiles/file/73805400223.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dcc11cdab0---56861036836.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/ladij.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/mojomavenuperezi.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/54383901302.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/bukatufufolo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=iphone+12+launcher+apkPDF 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_off0000e442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE442 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC59 10428 bytes
SHA-256: f68ec42796fb8b75444cce1219428271beb87472853336f85bd53981c684a895
font_02_sfnt_off000113ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FF 18900 bytes
SHA-256: 36045e84ae5bddcea7c04ac225911c6fbd094ec07fe102fbf2afefe5cb0ab34b

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