Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f6361526c328fdf…

MALICIOUS

PDF

101.8 KB Created: 2021-06-29 22:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e90fdac5f22168513b2fde5f74c10f7b SHA-1: c2f291302470f90ab66eeebab4a43381aa0b935f SHA-256: 2f6361526c328fdf820808722cd5c7a1ca8527d6c5f19e0d84be460cd3f97480
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting it is part of a phishing or malware distribution scheme. The presence of a download button lure further supports the attack pattern of tricking users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/1510935a41212978528fe61ec57153f5/58650748311.pdf
    • http://thefjordbaklawfirm.com/clients/876731/File/21878142489.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/8f37010265d8685b9dbe9372f10776d3/76618998007.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90c8598bb8---4991206186.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079952c283fa---gitugidigujopezadabosoru.pdf
    • http://ligneus.hu/upload/file/nobuxokegoxedezabu.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608400e86ed95---dekekuma.pdf
    • http://lateonsettay-sachs.org/userfiles/file/24291216171.pdf
    • https://weeb.nu/userfiles/file/9485442340.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/jo5aq3kiva66p14s1kvrqd16h9/buvajonaminefagob.pdf
    • http://phoiinnhiet.com/images/uploads/files/49675280790.pdf
    • https://irisapp.cn/uploadfiles/fckeditor/20210515/file/16210330582040.pdf
    • http://asbufestival.com/uploads/FCK_files/file/kevasajixu.pdf
    • http://stevis.cz/files/file/723840712.pdf
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/34520616317.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0945e60e2---sotiwevoresaninawogapu.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/b05bc59b6749f54850ce738569130f5b/71919531181.pdf
    • http://okwmd.com/upload/fckeditor/file/50268000826.pdf
    • http://gwhs79.com/clients/867100/File/83845210876.pdf
    • https://avenue102.com/uploads/file/kekesajeg.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/52072921050.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/812be9fb43aac5265cef0e7898939521/zisedorusivipexemije.pdf
    • https://liantoong.com/archive/upload/files/83350907942.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=revise+for+an+exam
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012fdf.bin
86cdd139ab7e52413219951d0a232e4d5321c8147e75c400ff236cc66a370775
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FDF 10444 bytes
font_01_sfnt_off00014796.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14796 16792 bytes
font_02_sfnt_off00015fa8.bin
ca8a9a3f44e2cff5d2b7f2b02fd0ace2831b55fa89404fe4db5465e085312db4
pdf-font-stream PDF embedded font (sfnt) at offset 0x15FA8 16780 bytes