Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72dbb94ed0de111…

MALICIOUS

PDF

82.5 KB Created: 2021-09-10 22:25:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: ed4b982a8363a7bddba1ba08a29a8392 SHA-1: 4d69bd0de4e00a277e9abd5344607ca69421b799 SHA-256: f72dbb94ed0de1116d6c705ff27a612071e0c0f2bb84fe4930cc13e570d9850d
126 Risk Score

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://satcomlink.com/userData/board/file/wimovurosedapivapadikuv.pdf In PDF document text
    • https://fishboat.hr/files/60396293249.pdfIn PDF document text
    • http://zjleiou.com/images/upload/File/sudorarom.pdfIn PDF document text
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/mijuturoxit.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1613727ee3f4de---mijedugidabev.pdfIn PDF document text
    • http://kotrackusa.com/fckedit_file/file///20210901_22_52_4.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/xazemajurudanekatixotab.pdfIn PDF document text
    • http://olgapolyakova.de/files/files/wowowuxeg.pdfIn PDF document text
    • https://livermore.com/wysiwygfiles/file/rawezuwebubumusagera.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/sanefasodiged.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/84795319264.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/dalesimafirikelix.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/woxilofajajivejegefivupig.pdfIn PDF document text
    • http://deforma.it/userfiles/files/59435793904.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/mebivebas.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/70815060924.pdfIn PDF document text
    • https://warungmimpishio2.com/contents/files/12671872984.pdfIn PDF document text
    • http://sun-apartments.pl/data/pages/45271070246.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20210908110645.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161368c730d6ae---43273283210.pdfIn PDF document text
    • https://www.domosystem.gr/ckfinder/userfiles/files/dalerazuwi.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/b5o1makfbi6254coe6k1hjfmk2/75856681974.pdfIn PDF document text
    • http://millenium.moscowfashion.net/content/xuploadimages/file/zupejenojozexeguji.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/76580671389.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=electromagnetic+waves+lowest+frequency+to+highestPDF 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_off0000da6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6C 18456 bytes
SHA-256: b1587ac789b73fcbcd6505b9823ec346d15114487f84fe2bbb46b0d3a7cf65c1
font_01_sfnt_off00010a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A64 11280 bytes
SHA-256: 7dac7d17c3f908cc0546bda075f79cd66c2d48dc7c5789c5efe60741887f4736
font_02_sfnt_off00012474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12474 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1