Malicious PDF — malware analysis report

Static analysis result for SHA-256 96fe69634e7b22c5…

MALICIOUS

PDF

74.5 KB Created: 2021-09-15 09:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c696539fff58086de6de6fb7c055f6dd SHA-1: 5b9e948b63b3b162daad1166806ccc4f6b7e57be SHA-256: 96fe69634e7b22c5b0067cc2d5a64133ab28234f5f1c502906f252947a294cc8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. The file contains a link farm pointing to various domains, some of which are hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://oniceh.ru/uplcv?utm_term=reface+app+premium PDF link annotation
    • https://biomisszio.hu/tmp/wovapavuzegi.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/okh72oeclt98ptg2fn7pl4qr87/66463527714.pdfIn PDF document text
    • http://onyx-innovations.com/assets/ckfinder/userfiles/files/13541488630.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210907070811368851jmsic.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/18075971198.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161412ab7ce03a---76606939890.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/7699301844.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/f291ea07cba84ca311691f0d801975d7/gewaxisosa.pdfIn PDF document text
    • http://hodoan.net/userfiles/file/20246204238.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/xuwimed.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/4902179811.pdfIn PDF document text
    • http://weingut-suppan.at/files/64905955900.pdfIn PDF document text
    • https://vzglavniki.net/data/file/wopetewagedudaw.pdfIn PDF document text
    • http://zaiger.ru/img/file/xotezulobuxosim.pdfIn PDF document text
    • http://anpo.vn/upload/files/91047205333.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/rijasagigujafosobizopadi.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/74196194130.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7981a1911---33240062682.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210913_D7F26755D2B5E97A.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/87cb4a68a3d7f8fa762ee0ce97459b81/zafuvudesulugiwujut.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_off0000bf0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF0C 10252 bytes
SHA-256: 0b7fba4eceda67c83db1b2f87c5f7c0541e6e048c82fdcce9d13e263f575af30
font_01_sfnt_off0000d611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD611 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE23 17844 bytes
SHA-256: 5a1a38f502b916ab7cf5f22e555c6a0c9d27d8a35312b79f4df586367fbcabea