Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3003ed7dc3f668…

MALICIOUS

PDF

81.1 KB Created: 2021-07-06 02:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d67e897ffb567dafdafb8dc6fc6af2ea SHA-1: 2fed55ff7dc119fbc3cf2953201d49d614bd2679 SHA-256: 0d3003ed7dc3f668051bfe41a73eb374638b19bb7e08c55c31ceab4a95afecd4
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The primary attack pattern involves leveraging these compromised sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/74d765da3d8dde28fb9ce850ce384eec/76448269932.pdf In PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5202e5d3c8---zuzobifafadujumu.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/zugorerekiruxos.pdfIn PDF document text
    • https://yodobashi-church.com/58333231481.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/dbcc60efc27b38f924c9b66a23fa390c/6585552517.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bf29a774e2b---29440117983.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/dakumekakomozebunuru.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ba65b527a---59367162722.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/mvf100d9c4m652cvkhfovvg0g4/xuvejutiwirudi.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753dbb574ed---49568335557.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/faxaluxuxogew.pdfIn PDF document text
    • https://termoformat.md/img/files/10259805648.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/dorubatid.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/3c9b5be719ef8301aa5a0e1215d27f82/tilevonivanafipozuja.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/8b042744f2670dd38daed1cb39b2a372/68668012140.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160987766baffc---26214422376.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/ratujilidikumexefi.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/99044301686.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/81439409758.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/27986947600.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160789a07a6b52---95873416795.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16076eebae00c6---belise.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/posirarusoxag.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/52164875725.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/71214409222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=substation+protection+pdfPDF 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_off0000da11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF228 10880 bytes
SHA-256: b7f5f91033222cd906a8ef60dd0a8c0bb65e1b6f64b077974ebc92e86859e88a
font_02_sfnt_off00010b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2F 16352 bytes
SHA-256: a5f17453059a8d5671b654abb5daff770998158901b75c723d3e154ae7fdb0f0

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