Malicious PDF — malware analysis report

Static analysis result for SHA-256 edeaabbdeca3fbb4…

MALICIOUS

PDF

84.2 KB Created: 2021-09-21 09:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e0bd308916d6fac401d13f2aae8636ff SHA-1: 7ee53e730d7818f2a2c9cf21a7358e91ca8d2c5f SHA-256: edeaabbdeca3fbb4d03a21b1a0c74d8086440db613b88ddee756fe0d3defe603
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. The presence of embedded URLs and the nature of the heuristics point towards an attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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
  • 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.
  • 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://crewmak.ru/uplcv?utm_term=app+download+video+porn PDF link annotation
    • http://highendschmiede.de/highendfiles/file/zovawanesuzolavomemi.pdfIn PDF document text
    • https://vinocastillo.hu/editor_up/kejudunizenefadina.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/redinijoxemuxetogike.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/1906121837.pdfIn PDF document text
    • http://www.pvvc.cz/files/82110442211.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16133d63202b26---fujemufemidomu.pdfIn PDF document text
    • http://temple.mo/userfiles/file/72111977916.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/44816418965.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/38381735649.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/9853847889.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/63897151338.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/zemexanukamulomex.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210903115126.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138fc62da943---jivutujerubufixowise.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/57769022439.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/zigulijoloxafakex.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/jipapewozipuzanebibotuxov.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/wowomemidizide.pdfIn PDF document text
    • https://novinfasteners.com/userfiles/file/pikuputewezemewubopamuj.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/58102560286.pdfIn PDF document text
    • http://preiswerte-unterkunft-papenburg.de/mediapool/wutozofe.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/kilakobufowufitufidijiv.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/tanoxetoregire.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/49301308944.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/jopegiw.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/a7fba06e8a2f217140b85a0f3f917e7b/67018878932.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_off0000e479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE479 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC90 10252 bytes
SHA-256: 5e1b9f2731a6b401bca53661b23cd81c2231d29c1bea76e3942d88bd56c3ae1f
font_02_sfnt_off000113b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B5 18592 bytes
SHA-256: 236dd5903bd9f6979e2efdef8c83e5ceac3d8efa1609410775693f89de28500e

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