Malicious PDF — malware analysis report

Static analysis result for SHA-256 084c6fde29775074…

MALICIOUS

PDF

77.4 KB Created: 2021-09-20 02:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 632448445b4587ddbb36338c2704b49d SHA-1: a1eb519a4331679b45be6f85d7c432b682f0f07a SHA-256: 084c6fde297750746a231aef51e1329639b0799a80ae681ccf511b585c37b393
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to exploit users via malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/665483f60dfa195d7cad29a72eb9dbd9/vepafuxuzolawev.pdf In PDF document text
    • http://loaamtran.vn/files/usersfiles/files/74130017633.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/43078419847.pdfIn PDF document text
    • http://ajej.pretty-match.com/upload/files/bukopelugovetu.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147c0203844d---seropesekixajabukitejesak.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/12081378862.pdfIn PDF document text
    • http://bangdientunhk.com/upload/files/gelipiselijesa.pdfIn PDF document text
    • http://princeverma.in/uploads/files/93737416597.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bccdfc1ea6---fukujavaforiwemovu.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/78006467925.pdfIn PDF document text
    • https://camerabentrenet.camerabentre.vn/ckfinder/userfiles/files/kekosuwogere.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/98584129253.pdfIn PDF document text
    • https://sleepthai.com/piceditor/file/jeludugukonaru.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1614690e1cb862---50198105421.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161426553909f2---tepenusipazopofetuvizuno.pdfIn PDF document text
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/kixidoxeworubaralo.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/36717371936.pdfIn PDF document text
    • http://xn--989ap7r0xbd5x.com/upload/fckeditor/file/32663462303.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1016bbb00---32662853981.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/30773831256.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/dijonipavarafinufuwusu.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/ziratawudov.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/katusenejazalun.pdfIn PDF document text
    • http://waypl.pl/upload/File/vamezerinipol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=hari+poter+i+dvorana+tajni+pdfPDF 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_off0000c6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B8 10464 bytes
SHA-256: 465c7e52bfd7a00a9c31b89e76c4d6873cdb235aa1423de7ddc85f22654558dc
font_01_sfnt_off0000de81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE81 19148 bytes
SHA-256: 11dd37e31c126af95213a11f41f1edb4d81b3fb4cb72abb8066baaa9bef2887a
font_02_sfnt_off00010fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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