Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bbfa15343d415d3…

MALICIOUS

PDF

80.0 KB Created: 2021-09-09 17:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 71301d8407c3a130f897b2ad90e7a7b3 SHA-1: 10902b679f07698b78ccad2db441a31c6509535d SHA-256: 6bbfa15343d415d33f9d71ee607178852448e386be91656983a9cd5bd829f27e
164 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised or disposable hosting, suggesting a link farm designed to lure users to malicious content. The presence of a 'download button' heuristic further supports a deceptive user-interaction goal.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lakesnwoodskerala.com/uploads/file/gerupodigonesofupudak.pdf In PDF document text
    • http://bestbelly.org/content/files/files/vafimajusudizojirixeligow.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/lusowefiravutelosup.pdfIn PDF document text
    • https://drishtinetcom.in/FCKeditor/file/24471229531.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/52164606411.pdfIn PDF document text
    • http://charontrade.hu/data/file/56742754711.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/90931420540.pdfIn PDF document text
    • https://pindimana.in/uploads/file/likiw.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/16819926991.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/sqvncqa7b81gr60lmo1nm5l7o8/7150599944.pdfIn PDF document text
    • http://origo.ws/userfiles/file/dedopaviwonamiruzisa.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/wubavisovebowuxinamarowa.pdfIn PDF document text
    • http://phuongdonggolf.vn/app/webroot/uploads/files/diwulapajolosof.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/161336657cf28d---12845832167.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1612eee21cde8f---bunivat.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/jinov.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/sebideremuzezosodiwepuwiw.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/43075002509.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210901_BC91C797BB026DA0.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/fixapofiwote.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/xasuxifejasitopikafegez.pdfIn PDF document text
    • http://synowka.pl/galeria/file/33125701010.pdfIn PDF document text
    • http://homokkepek.hu/editor_up/75824501572.pdfIn PDF document text
    • http://quaisetoiles.fr/img_pages/file/nakuzineduweja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=kooku+app+apkPDF 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_off0000d4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ece1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE1 18528 bytes
SHA-256: 139bb2d4d8c0b1d84159c2fbbcc4aeec990c39c2a29ba9bfd1da757530f9dc1b
font_02_sfnt_off00011d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4D 9688 bytes
SHA-256: a994db86189d6af690a1b73c1949071d4d4a73cbdf57453bbf48def6b4497e51

Open this report in the interactive analyzer, or submit your own file for analysis.