Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1caf820042fb27…

MALICIOUS

PDF

77.9 KB Created: 2021-06-24 10:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5eaac237ea72b8a2bec7ef1c94c569b3 SHA-1: b8996ab13c29bd560c50dbe6eae25a279e044551 SHA-256: ed1caf820042fb27afd5227c100bc3a21ee467f6dd6f07ebd0cea10b64e5b474
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage, suggesting it's part of a phishing or malware distribution scheme. The presence of a 'download button' lure further supports a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/27785c33872e816c4337f3fbe661ae29/60822396442.pdf In PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/11693777088.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/nizamibokazavitakedo.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c2972af0c---41775328241.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/3p8etnq541gohki4oabceahkr4/29002916464.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8847d245b3---fubepufirisafolitajoxejar.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/wesurasodusebatup.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/80492103294.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/83508137328.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/a45edd60f08ca4d6762dc1c9238e923c/wivodejadi.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160986edc30100---771113496.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202106/file/1623060176.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/fep9abseh9ekrncikf9dsu4m7m/92064384275.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7572a7ad65---34053594726.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4b915ccd2---36690500183.pdfIn PDF document text
    • http://health-bridge.in/upload/file/xidokexulemarag.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/afa8a74dd39c5c2942dc3786d5bf4bd2/58839501864.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/3a2748c4908091e3b621bfffc3983f65/50918531917.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=mac+add+pdf+printerPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA21 2912 bytes
SHA-256: 29101dccbdd26b917ab81d9bd75cbbd6cc1355d83463c73af800c3f6313db59d
font_01_sfnt_off0000f487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF487 4944 bytes
SHA-256: 618ebff711a314685f58f5ba29a078a8f2289a09285cd9ca30321339b520b63f
font_02_sfnt_off00010579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10579 10832 bytes
SHA-256: d9f0dee62d107b2b905f15d1e051db8ae26b3172b2cc0e6c6a6cba41905fa952

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