Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1fb7269a4a4ccb6…

MALICIOUS

PDF

87.8 KB Created: 2021-08-06 21:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5cce16ee76bb492e045da24f613751fb SHA-1: 7f408309351d3ccd521a8baec3aad7dc18f2bbe8 SHA-256: d1fb7269a4a4ccb6315faf5d1aa82f997b6e1dddb19d501b5da711701a837c73
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting, likely to distribute further malicious content or phish for user credentials. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the true malicious intent and potentially leverage SEO tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/3372a6649074727473e3dfaddd0a773a/wulopototigog.pdf In PDF document text
    • http://ymy-tea.tw/upload/files/vimolulo.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/71737750511.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/gnnfmpaaj19vpehbrem7j4da46/71213978136.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a96c2a19b2a63a4ba10cc5431a1ca02f/botipek.pdfIn PDF document text
    • http://bruningfoundation.com/clients/9/99/99acc79c432c4c389b364f5b25189af3/File/43152996192.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/0m2l4mjevacbra796bceisiu4a/75025951390.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/sezewifowi.pdfIn PDF document text
    • https://steammining.com/userfiles/file/ledetubulifilakalunira.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/49117887874.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d78025ba35b---luwapugejazuzofirikil.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/jagekewas.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/xewejaredakugufen.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cec9d3264---65163799087.pdfIn PDF document text
    • http://amdind.com/userfiles/file/3591437016.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/k9kofhpohgl45kau7uai6thk9t/kudodalekijud.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6af2cda0aa---69691277726.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075fbd51dcf8---vawalinove.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/q4lhn9ro6jegiobq8cbacu0mbe/16238117753.pdfIn PDF document text
    • http://www.netcorp.hu/data/editorfile/21772076185.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/57901451523.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/4a42a7ffb7c6a2b813e66bd02db5c6f0/91425804701.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=avg+secure+vpn+product+keyPDF 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_off0000f397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF397 17116 bytes
SHA-256: de8820b5b76cfa91116d45eb81ccf55bd49432bbd1cb5204c5a5932407c824b6
font_01_sfnt_off0001201e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13835 10740 bytes
SHA-256: 26bd8c5db13dee14de99283a5b9a9431e3b0105d3383cd4c02039ed6fe28672c

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