Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02659ba9548d107…

MALICIOUS

PDF

101.0 KB Created: 2021-09-13 21:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 375e1a97b8de0542e18f8788c6efcabf SHA-1: 6bb50eefeb61b74cb93fe43010f0b6b5dbc3f83a SHA-256: e02659ba9548d107d5e872f1c2bc695499bf2d8c6ee6b247be4a4223ff461413
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document exhibits characteristics of a phishing lure, presenting a fake CAPTCHA to deceive users into executing malicious actions. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content or download further stages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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=free+fortnite+v+bucks+ps4 PDF link annotation
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/9d3587f36b4352f33f9e584d71d22c04/92791561719.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/87034976891.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/79299644675.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/15478732074.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/jesoz.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/44715450452.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/87859951103.pdfIn PDF document text
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/44739830818.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/jekawo.pdfIn PDF document text
    • https://felicityokolo.com/file/44269511044.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/gewin.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f1e5b0c2b---rinoz.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/8124936741.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/3987579223.pdfIn PDF document text
    • https://bosingels.nl/ckfinder/userfiles/files/ludux.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/lexab.pdfIn PDF document text
    • http://tubesealer.com/uploaded/file/852121282613ce7fcdb850.pdfIn PDF document text
    • https://topupdana.com/contents/files/gusop.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161394731e3cab---tudadaru.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/68299369718.pdfIn PDF document text
    • https://longhoang.vn/upload/files/xozaxanizuju.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/bubiributobupujawev.pdfIn PDF document text
    • http://tehla.eu/userfiles/file/somaj.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/gagapakamaxutizoro.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_off00011f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001377f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1377F 20516 bytes
SHA-256: 315d091828fcffbfadd46ed959265566d6cf7d5e5d42e11e7b102985c3c0ec5d
font_02_sfnt_off00016dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DD2 10720 bytes
SHA-256: 05d958b43e9c99056fc8f620c954701d57e4c72a7578853ae9ab51953147580a

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