Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc179013ae624008…

MALICIOUS

PDF

81.1 KB Created: 2021-09-23 01:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0c7fa7a308e78fe4b9a4a97ce1a47105 SHA-1: 4de3da9326f56c4cd11f4aaa23706a3df1676312 SHA-256: fc179013ae6240086deea0b105c0aab5dc74d3d4e1b2d25df154feeee15e5783
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://huntic.ru/uplcv?utm_term=let+me+love+you+quotes PDF link annotation
    • http://elfuklid.cz/foto/Image/file/xapoximeraguzagato.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/54705351413.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/59065780879.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/retunagatuxi.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/piwomitevuxugulupusegi.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/najamemugebove.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/48568171787.pdfIn PDF document text
    • http://ipayon.com/root/FCKeditor/file/65184351928.pdfIn PDF document text
    • http://www.moyekolodin.com/files/gudok.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/77697520241.pdfIn PDF document text
    • https://mabuksusu2.com/contents/files/1379474326.pdfIn PDF document text
    • http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/tegan.pdfIn PDF document text
    • https://macintosh-szerviz-javitas.nuttydog.hu/ckfinder/userfiles/files/44116481521.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/fezosejisokaruvobugureruv.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/lanazefexuveg.pdfIn PDF document text
    • http://directopinion.biz/uploads/FCK_files/file/naluwevasitasovomi.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/34686683032.pdfIn PDF document text
    • https://komunalno.vrgorac.hr/files/91258092021.pdfIn PDF document text
    • http://ecohouse-lab.de/userfiles/file/rofukomagoguvamakalun.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/52355379681.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/5566694194.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/23a2704358df17a0f724fb6baf79d39b/21753584227.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_off0000d8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10A 18292 bytes
SHA-256: a6d51de1f0096021e5a8e73201655cdab041ad9f4a63d786327dd4c10d179465
font_02_sfnt_off00011fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD0 10192 bytes
SHA-256: 1c4027be23288eca74cfbc30b9103efb6397c6fda8e7a01d279eaa835aeb8de0

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