Malicious PDF — malware analysis report

Static analysis result for SHA-256 6accf75be34d1dea…

MALICIOUS

PDF

75.7 KB Created: 2021-08-31 06:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 368986df9de25ba82b6ac4c359909f16 SHA-1: 0374ae7f66d37faf21feebdf47b874635b6ef6f7 SHA-256: 6accf75be34d1dea5d0ed34912af8fc156b0e743ffb0ae3d7ad2d80c977e61eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many of which point to compromised CMS upload directories or are part of link farms on disposable hosting, suggesting an attempt to distribute malware or phish for credentials. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=autodesk+autocad+2014+free+download+full+version+with+crack+64+bit PDF link annotation
    • http://ttccid.com/userfiles/files/3438528623.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b6d100bfa---lilisamuk.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/71355570491.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/tazasevifofasaro.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/jedojogupib.pdfIn PDF document text
    • http://di-tech.kr/fckeditor/userfiles/file/71033317206.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/libimuvogu.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/1525302898.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/19604333777.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/tafuvoboxox.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/49948314631.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/16366350975.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f73ab5710e---wuposezisakusolajo.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210620152652_086ovj.pdfIn PDF document text
    • http://spiregene.com/image/files/20210806_220120.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ef0fdcbc2b2e700ada4b5017b927fb9f/xozakir.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/0ce19f10da57e9c922a3519c8f08d0e6/66130303673.pdfIn PDF document text
    • http://tulsacentral1963.com/clients/3/39/398188050227c7f1c8b3045a0a865105/File/64969942476.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/eabbfbc8a68911cfb831b8081689e83f/48507544089.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/21893986818.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7327e783ea---palixunaja.pdfIn PDF document text
    • 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_off0000c24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC24F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA66 11580 bytes
SHA-256: a9332ada71994026552e9fee30bb40de0e10bc0f4036522894839768385432c7
font_02_sfnt_off0000f603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF603 16520 bytes
SHA-256: 296038523044562a6d7448059c32dc00e964246e674e853d8f15268870eb3ba4

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