Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0669064070d1d5…

MALICIOUS

PDF

85.2 KB Created: 2021-09-20 13:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b9b41b8d51416fd971ee8ab796932ff0 SHA-1: 87670cc8551e1cbe72a3332c810a99ca93e6985d SHA-256: 0b0669064070d1d5a706c65300314e249417e9fe3b54251704a4c555100cfcf9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. ClamAV and an ML classifier flagged this PDF as malicious, indicating a phishing or malware distribution intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://graciaindoutama.com/kingkong/userfiles/files/51588643978.pdf In PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/18d0c89940b67f440d603c842a8c37b7/fexebi.pdfIn PDF document text
    • https://autopits-directo.migrupoq.com/ckfinder/userfiles/files/polasiwikowewivu.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/boxagute.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/gaxuxozexuzivip.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/gebibuzix.pdfIn PDF document text
    • http://lecieldesandes.fr/ckfinder/userfiles/files/16130100149.pdfIn PDF document text
    • http://sake-tori.com/images/library/File/64229240152.pdfIn PDF document text
    • http://thainightjob.com/ckfinder/userfiles/files/18082582622.pdfIn PDF document text
    • http://chipgene.com/image/files/20210908_005720.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/67916816699.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/97645462676.pdfIn PDF document text
    • http://www.sctiec.com/up_files/FCK/file/tironofasenuwukaloxa.pdfIn PDF document text
    • https://xetnghiemadndanang.com/upload/userfiles/files/wedipiwerusoxoxo.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/34689364361.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16144c19042583---gijutagozebagenotavadotuv.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/81815506657.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20210903064613.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/46114519082.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/vofuxog.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/91632936728.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/wokitemedaleraku.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/buponune.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=infinity+war+movie+freePDF 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_off0000e7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AD 10376 bytes
SHA-256: e520455cc4adddbc01be936e3cc74f3b4077126ca35bccfa380976b8b82730e4
font_01_sfnt_off0000ff30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF30 18584 bytes
SHA-256: 78d440201618e4058b09f8c32ac07f0d9adb982d8a880ab8c0146a7d72ef6b3b
font_02_sfnt_off00012f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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