Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee3a536f4e0e02a6…

MALICIOUS

PDF

79.6 KB Created: 2021-09-17 14:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0359fe2e51e0bbedd70a75f6ad63b5fe SHA-1: 3bfbd29568445fd396d7efae35a434de5406fbff SHA-256: ee3a536f4e0e02a62a730ac8a77734a292dc7e984a0f599e5f5a4dffccd68c90
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, several of which are identified as compromised CMS upload storage or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://abwjefferson.com/uploads/files/foforibop.pdf In PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/tabibadapovoxosu.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/1550798757.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/40337493059.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/vazazasowebipitirapibofil.pdfIn PDF document text
    • https://ecohort.info/userfiles/files/96384407545.pdfIn PDF document text
    • https://ivanamihic.com/files/tekuvoxufu.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/navatogaloxora.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/84782856618.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/76304929476.pdfIn PDF document text
    • http://nandishoverseas.com/UserFiles/File/81149160111.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377fe58b03d---pewilusa.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/xevemudimaku.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebeede7dfc---45765044080.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/51534038560.pdfIn PDF document text
    • http://ammk.sk/userfiles/file/33296751961.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/dujefidowij.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/tefapuvowozoxipodusa.pdfIn PDF document text
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/vofomadizojefu.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/86550527821.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/1af1bd4233d62f3d5d85df4b5d5b44aa/zifegubatogela.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/995331085.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612f25eea60cc---gizowajewexotu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=real+boxing+cheats+androidPDF 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_off0000d28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28D 17656 bytes
SHA-256: ff53435f46fdba575c424114ab01f2fc79b1644add81235aad10a270f3a0eead
font_01_sfnt_off00010061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10061 10936 bytes
SHA-256: b8ac6b2f583894db67964cf32d3a65f1c2c0fab63e8654b9e4672874c0bd031c
font_02_sfnt_off0001197e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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