Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbea5c9f8b4bad01…

MALICIOUS

PDF

86.6 KB Created: 2021-09-13 07:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5a36ecf9f287544480113100e3de6adb SHA-1: ca96ddba64e4e5d8bd139c2b03481a595b51594c SHA-256: fbea5c9f8b4bad01f2b50d4c9f7fb07dc0ff91a2e2a4acb6e1633805f236a8e6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9974

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://coretry.ru/uplcv?utm_term=nds+rom+pack PDF link annotation
    • http://casms.org/atts/news-files/file/kulixura.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341431f1b3a---71811975592.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/76762523528.pdfIn PDF document text
    • https://sassanoproperties.com/FCKeditor/file/69717939628.pdfIn PDF document text
    • http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/85498633737.pdfIn PDF document text
    • https://elperrocallejero.info/ckfinder/files/77336732025.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/dpu72ko8rbgpp0uod83hshhehj/mafagewikubojexebop.pdfIn PDF document text
    • http://quesnelbusinessnetwork.ca/userfiles/file/ralow.pdfIn PDF document text
    • https://poulinstrapscan.com/userfiles/file/serarebajatudenomizu.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/basidexe.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/nupaxabamidotepag.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/juwidenadowuzowesu.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/31580695878.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/xejixakatarixuf.pdfIn PDF document text
    • http://styropapex.pl/userfiles/file/nolomiziremazenikafiwope.pdfIn PDF document text
    • https://dauglita.lt/components/com_mijoshop/opencart/image/data/files/78287175778.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/likikozovu.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/wasutiki.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/29845947388.pdfIn PDF document text
    • http://coconut.hu/userfiles/file/85444591064.pdfIn PDF document text
    • http://mosjob.ru/images/file/xisawo.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/25087281319.pdfIn PDF document text
    • http://nasfthr.com/userfiles/file/93848174990.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/34186774435.pdfIn PDF document text
    • 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_off0000efe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE7 17460 bytes
SHA-256: 0f73300cbed2b134eab65fb9fda9eeaf4eb7921ba11e7bd59e88556a19842b6d
font_01_sfnt_off00011d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D85 10272 bytes
SHA-256: 2d2349774ace24226849d5eb2faa34199849d671cf0763935fda73fd6e0ae6ce
font_02_sfnt_off000134a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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