Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b3ddca94e9ec20…

MALICIOUS

PDF

88.7 KB Created: 2021-09-06 13:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 539c6bb2ad7d27a2349f3eab9ec43072 SHA-1: bf535505f0a667e4ede74a3a82aaa0ae12b4ee18 SHA-256: f2b3ddca94e9ec20065b86f28520131860da0c9381f7b6ac6b9c4f5c5a32f707
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm or phishing lure. The presence of these links and the overall detection indicate an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://garglob.ru/uplcv?utm_term=what+is+feminist+theory+in+literature+pdf PDF link annotation
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/50qtm23niqkfhfqfffk7st8fkg/34537670863.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3500a4027d---64287330632.pdfIn PDF document text
    • https://botroul.be/uploads/46851421720.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/nipumupokupanusuj.pdfIn PDF document text
    • http://www.siposferenc.hu/html/zanukufobizare.pdfIn PDF document text
    • http://sksound.com/userfiles/file/28403307508.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125fb621ddfb---vemakaperosugusubivegar.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79a4419cb3---37728832444.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/82635613509.pdfIn PDF document text
    • http://joomlacode.org/fckeditor/editor/filemanager/img.php?file=file/55658223498.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/lofimol.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4247e8204c---wowirovevanasanafamexite.pdfIn PDF document text
    • http://radis-rrl.ru/userfiles/image/79316484328.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/6ad67451f0dec6a3f4eac41aa8661c17/vumimisogirotazovabed.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/0ca727815434097555a0696232866115/14688150089.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/c0cf15d2fa85d1e510eed63f9583d960/51479814361.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/e0bf365e0944e389fb318b1f2af8e2bf/81271377955.pdfIn PDF document text
    • http://whitepurdeespires.com/clients/b/ba/ba703c466af5784ee38134b9d09df413/File/70801856839.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e38399361---zazumeludejovabu.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/41bd377c51ae7f2fb7c4df5795012cb6/bibutomogimixezafekij.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/51768071836.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/71d9003564a38c23b1269f8e81f4e56b/13550313464.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/dupugiwefav.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/fopenijunosiwuwarobaxakos.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/82234921694.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/8759856473.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/973e1f5d7e889457a965aaf601f2300f/sutefikovewubi.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_off0000f3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CF 10968 bytes
SHA-256: 44a3523109a2da44385965e0e3115f8e9888f84fc58fe1c359646115c3b09915
font_01_sfnt_off00010d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D16 18556 bytes
SHA-256: dc42d69ac4ff683a554df3282a6b5ed1b200740bf8fb55097a8f88f7fd1eab9f
font_02_sfnt_off00013cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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