Malicious PDF — malware analysis report

Static analysis result for SHA-256 568630940742aecd…

MALICIOUS

PDF

80.7 KB Created: 2021-09-13 23:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a41470b8b94167300c642654b003855d SHA-1: 31312670db45571f57a159ea44a0e3d08cc8ddd0 SHA-256: 568630940742aecd961ab282de9f9dab2b6345ae079a19a1e4bef038a4f1b879
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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 https://luatsubienhoa.com/upload/ck/files/30428848724.pdf In PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/lipazenejuviwekajenavo.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/detiwosuk.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137fc1b32c61---15152290172.pdfIn PDF document text
    • http://lollanaclinic.com/image/upload/File/kowitiva.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/12055915645.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/feligi.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/34067191852.pdfIn PDF document text
    • http://soupworld.de/upload/file/77802058961.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210908045549.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73320405639.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/roxutufawibeka.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/vefafiwuteviziwikonud.pdfIn PDF document text
    • https://successalpha.team/upload/files/nudirasonamiro.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/96380261513.pdfIn PDF document text
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/xijumazijiwuki.pdfIn PDF document text
    • http://jongauger.com/userfiles/file/21849787436.pdfIn PDF document text
    • http://www.como-grup.ro/fisiere/file/49959747491.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612f370c16740---temofurat.pdfIn PDF document text
    • https://masukpt1.com/contents/files/81725821449.pdfIn PDF document text
    • http://bolt.fo/public_html/userfiles/files/puxewikipul.pdfIn PDF document text
    • http://dsfly.com/uploads/files/67267260923.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/64054510693.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/96890931142.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=android+tidak+bisa+konek+ke+wifiPDF 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_off0000d7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF010 10600 bytes
SHA-256: f3ee20cb4ba4bda7930994bbba897c9e6880150984265d43e7fbba0ce57f047d
font_02_sfnt_off0001087d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087D 17144 bytes
SHA-256: 25708f69b3127f17cce5b0ffd6bd926729a2af6d501c5d3ff6130b5980cc8a51