Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbcbbc670b8176f6…

MALICIOUS

PDF

96.0 KB Created: 2021-07-22 09:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8b081c96519fedb35dc9ff777e21fba1 SHA-1: f003aa589fb2c48a0b0a02e4094982f86ed499d8 SHA-256: bbcbbc670b8176f618aea9ac30fe4ad75cef3317df0967857c7c56b91c5a84e3
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1553.005 Security Software Tampering

This PDF file was flagged by ClamAV as a phishing trojan. Heuristics indicate it contains a link farm and instructs the user to disable security software, a common tactic to facilitate malware execution. The document also provides instructions for a password-protected archive, suggesting a multi-stage infection process where the password is provided to bypass initial security checks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://shindah.com/images/ckeditor_img/files/97723478801.pdf In PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1akkmqgf72jspjoddtd44ub0s4/74766218371.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/mivexutididul.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/9b29354f6c301a7c7ce1c4649b25ded8/44640250607.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/pojusijanimisozikolani.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b912513f08e---97380405088.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/mvl74g6l5p05eap3m0vj4m2362/88087971056.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/d86f3463449675e43d6d4a5dbc1fb491/31565156373.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/25413971286.pdfIn PDF document text
    • https://parfumzone.ro/files/file/rijopejagutep.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/5971703958.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/19512360137.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/46223997952.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/a2nujjgqf2semq2keu1u8893d4/ruwifugip.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/46045522151.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/7f35df550d06e9e3d369b1e38de46a66/titorimem.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608535aae767a---79934901029.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/57048396085.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93611646573.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/5b7ca635431767ed399d1b8e07f32415/24274490109.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8286abc80---dalemenasarag.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b05f8d88697---70663925619.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/pifolalivibatemi.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/6d74f53264f27a965d0223b437f8b189/84200846858.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=kmspico+download+officialPDF 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_off0001129e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129E 18032 bytes
SHA-256: 61676ac7d099b8157f450b9bb1f1545a00f85e0d8d83fd66a48ce624f7be031f
font_01_sfnt_off00014165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14165 10528 bytes
SHA-256: 8e41a787a82f13dfa118168bae1c99016280badb8f326f68198465ddd22849b9
font_02_sfnt_off0001595f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1595F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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