Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6124efe788d0512…

MALICIOUS

PDF

81.9 KB Created: 2021-09-01 20:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 94744ee62b0ae598160654448a179d9e SHA-1: 5b2dc244e705e0fa819fc3df1c6dd9119995a904 SHA-256: c6124efe788d05129d63131c28b50778dc630e1deb9586fbc463be4976628e64
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external PDFs hosted on compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://honkakuji.jp/honkakuji/images/ckfinder/files/jopobunaguvi.pdf In PDF document text
    • https://birudongker.com/contents//files/48377553867.pdfIn PDF document text
    • http://elateridae.com/images/FCKeditor/file/29020847809.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7da22169e---45467636885.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0652686001620773561.pdfIn PDF document text
    • http://lycee-elm.com/userfiles/file/pedaroturaba.pdfIn PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/13692890169.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/73388127988.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/sapazibibe.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/16017625317.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/56b85a253afce78063d69050127a954a/bofujigi.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bf58d26f3cb---debabetunigativabuja.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/bupibo.pdfIn PDF document text
    • https://windsbs.biz/files/file/lesapuvim.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/vudinabekok.pdfIn PDF document text
    • https://ka-base.no/images_students/files/72470334229.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/divulisenajokonitavov.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608af2273d180---86776621202.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/temumetomefe.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/af23018685f44ee6c68e17e8705eaac8/wojirujegam.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/jadvb365k1t7aioeu7vp77rjk7/nomagagibedasusorupalim.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202171471863887.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=dc+in+wild+n+outPDF 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_off0000d851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD851 19780 bytes
SHA-256: fff10e60d68e99735d9386656c541151d1bf0a404a7cbc092efbccf372079fa1
font_01_sfnt_off00010b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12396 9988 bytes
SHA-256: 29f6a5e1066bb1bb98316214d4cdaaaba2386be0b93171c22946de61dacd6f44

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