Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cc2b12f36a238d9…

MALICIOUS

PDF

96.6 KB Created: 2021-07-03 05:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 968fcc1da225abe700a080c331f42408 SHA-1: f336830ab643f4417aa498b78b1e3c44ca9b1ffb SHA-256: 9cc2b12f36a238d9236ee7ff8ba646f21abfc2909302605ccc658508932349a3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs that point to compromised websites and link farms, suggesting it is used to redirect users to phishing sites or download further malicious content. The presence of 'curl command linux' in the document text and the nature of the URLs indicate a potential attempt to exploit or download payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://drafthe.ru/uplcv?utm_term=curl+command+linux PDF link annotation
    • http://sehs67.com/clients/e/e0/e078d4d0076166a7bb489ca3b3a583ab/File/42893395183.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a53692d1eec---23509960007.pdfIn macro / runtime command snippet
    • https://rumahbaruku.com/contents//files/52439592334.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/cc397d909c602002623359322f4ce475/35619373185.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160737bdab9edf---61298400839.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/2075467162.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/gegomafulamuruwokikajagi.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/73mcfhmr6o9qepaebklkikfum0/zamizuvikononegon.pdfIn PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/187338496.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/65781854173.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/693833dbd011df3a519211e30107795b/lilotafidudezopep.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/91d0sf98rf8f161bp7mstcmhkd/78544162239.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071b0101d33d---26081207833.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/85200629024.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c346b9267f0---talabituritenisag.pdfIn PDF document text
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/gewovasupuxodaregenigi.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/99675262400.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/neropivosevidavubivewini.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/de15c36835f1dce0f5c6fc9ab4ce21ef/68264677286.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/69499777583.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/e1i9iqmlh9pk376t5tdktthv2f/venitu.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609876102472d---80092936464.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/sofato.pdfIn PDF document text
    • http://sehs67.com/clients/e/e0/e078d4d007In macro / runtime command snippet
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB84E 10368 bytes
SHA-256: d3d135b8cf0e0aa06ca57a95865a887bf99acce15f42eca5a256ef6917c8cd96
font_01_sfnt_off0000cfa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA4 15524 bytes
SHA-256: 436344a4615b97b023ad10bf1153637b74b72344fdfe24deb83de5e4446729c6
font_02_sfnt_off0000f757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF757 37240 bytes
SHA-256: a842828e07d20c635ebce85ac18800c751ee26b792d02f539dcfc3e7aac4623d
font_03_sfnt_off00015ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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