Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f2da9cb45bc70c…

MALICIOUS

PDF

73.2 KB Created: 2021-09-18 09:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 17d48e7dbcb52178307f0097f8c87805 SHA-1: c70857edd5f62de2ff9872f0a74d7ca5c9e84cf7 SHA-256: b2f2da9cb45bc70c5fcc274771836420eb62f452688266ecbec1541226dc7d5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various compromised WordPress sites and potentially malicious URLs, such as 'https://irlanc.ru/uplcv?utm_term=phone+number+money+glitch+gta+5'. The PDF structure and embedded links suggest an attempt to phish for information or lead users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://irlanc.ru/uplcv?utm_term=phone+number+money+glitch+gta+5 PDF link annotation
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613add08f071e---wized.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135fabc6b4a4---puneto.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139d4f361eb6---jekuwezosenulopipegoda.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210913044351.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/pesotig.pdfIn PDF document text
    • http://cukrarnakolbaba.eu/obrazky/files/joripuxukavomedavi.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613041becbadb---moxexuluvafefomez.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/52161080890.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/bfab7f54c52e340821b7bafa367bcdca/40640661045.pdfIn PDF document text
    • http://wx-bm.cn/upload/ckimg/files/202109130648196570.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/popazabatovujunasotokif.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/36782288840.pdfIn PDF document text
    • https://thebookonpersonaltransformation.com/FCKeditor/file/26716022368.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/matuzunim.pdfIn PDF document text
    • http://www.celso.org/download/49141079107.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/64823143258.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/xisepisenifapobowurimepi.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/ef3b33dbf8a629617a3b84b42d3fee9b/11633020450.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/bcd913decbb67263bac75c8d738f2601/42148748736.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/99549837599.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/e141b662251976dd628b3314841e2bbb/34454864577.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16138160760d3f---61762862956.pdfIn PDF document text
    • https://defi128.com/userfiles/files/pudidewo.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_off0000bea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA3 10996 bytes
SHA-256: 00838169750511ecd269051dde4e62f9f8df7bb448d76943c2d8e4945e9ea13d
font_01_sfnt_off0000d805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD805 15352 bytes
SHA-256: b9fbdccce4c24462ac41ad2d4a29853bac4a128acb1f68c109452cf9ad6a2615
font_02_sfnt_off0000ff0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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