Malicious PDF — malware analysis report

Static analysis result for SHA-256 034082b611ed8051…

MALICIOUS

PDF

82.4 KB Created: 2021-09-20 16:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 62b69a3b7333ae8b7c30a7acab249c04 SHA-1: 66c218adef5c0cae60694af59fdb9ab9efca5460 SHA-256: 034082b611ed805159fb12e90097a545d85da308fa5f01ca799759be79f3fe6d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The sample also exhibits characteristics of a link farm, directing users to numerous external URLs, many of which are hosted on potentially disposable domains. This suggests an attempt to distribute malware or conduct phishing operations by redirecting the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://ttmm.co.jp/ckfinder/userfiles/files/duxibewixoxaxo.pdf In PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/76232729670.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/38197784169.pdfIn PDF document text
    • https://poganyvolgyi.hu/userfiles/file/xomefewoxuwukuriwakuxon.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/75568145580.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/84245212325.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/161469d91ccaae---56894380583.pdfIn PDF document text
    • http://plaschke-partner.com/uploaded/file/dozogezome.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/sasijazijiwuxobamej.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/27723431825.pdfIn PDF document text
    • https://www.twibiotech.com/plugin/ce1/ckfinder/userfiles/files/tosorilawusajaraw.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/51876582307.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/35173118458.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/lefedevukufawo.pdfIn PDF document text
    • https://generalaudit.pl/eurostyl/photos/file/30017009841.pdfIn PDF document text
    • http://ipcmanpower.com/admin/style/images/userfiles/file/bivunenozo.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/zugokezapegogewajikisuma.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/xebikidamoxesezowajubob.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210920050914.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc76eb316f---xasojotixasus.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/88643236396.pdfIn PDF document text
    • https://ivanamihic.com/files/43539275158.pdfIn PDF document text
    • https://ms2oke.com/contents/files/pexedowefemifamoru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=body+scanner+xray+camera+app+downloadPDF 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_off0000dda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA9 17376 bytes
SHA-256: bd4dc99a9e63dedf680934597cb4e3695414a542340635ed930ff7c0fd97d6fb
font_01_sfnt_off00010aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12303 10840 bytes
SHA-256: 74f8629c6c49d661b90a7c1fcf7bc36f00df8c9bd58b2fd40929fe6d9ce36065

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