Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a9f289af674d9c…

MALICIOUS

PDF

85.8 KB Created: 2021-10-18 23:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 11a0b16653108cb113c04a1afb60b55a SHA-1: 413594ffb2f4f8958287eed00376f4711d3e6a3d SHA-256: e6a9f289af674d9cc603a7c23ff09788ab96a4226973f5c4aa1040e9aa31ad9c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to disposable domains. The document body is heavily obfuscated and unreadable, suggesting it is designed to conceal its malicious intent rather than convey information.

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://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/2683439869.pdf In PDF document text
    • https://hyundainhapkhau.vn/upload/files/kanugetegitaxuvunosed.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/tadeserejenawixagaxanovim.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/roxol.pdfIn PDF document text
    • https://efnnma.org/files/file/50390602299.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/57394111428.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1616a9f4c15b0b---36900550775.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/gubatipevimefozabo.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/90922092727.pdfIn PDF document text
    • http://jn-zhsc.com/upload/29122153334.pdfIn PDF document text
    • https://semut73.com/contents/files/59076943521.pdfIn PDF document text
    • http://lohoithaiduong.com/uploads/files/78674683499.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/23497893109.pdfIn PDF document text
    • http://vector-food.pl/userfiles/file/bijuwodiritizodeb.pdfIn PDF document text
    • http://yachts-trade.com/files/31890804136.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20211013121549.pdfIn PDF document text
    • https://areicon.com/images/file/dusagoji.pdfIn PDF document text
    • http://somkuthyoptika.hu/editor_up/83473559087.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1615fdd1d73303---80607783215.pdfIn PDF document text
    • http://khocabien.com/uploads/files/bululidiwafefoxusofanat.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/23838456995.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/24157212194.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/26094518304.pdfIn PDF document text
    • https://aspart.ro/ckfinder/userfiles/files/zobasomukarimu.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/jofadugevorebukogazuj.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/2I9n2o-U8HI/uplcv?utm_term=resumen+del+libro+el+diablo+en+la+botellaPDF 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_off0000eb1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1D 17992 bytes
SHA-256: 742aaa9c33fa728541b942d4a6afe263610081ff8d7097caf628566c0af2f084
font_01_sfnt_off0001189e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B5 10696 bytes
SHA-256: 522ddfaffef25349d556ce1bef3aa743ca137c305bfac893f4a2af800093ec8a