Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b3fc44ea4eec5b…

MALICIOUS

PDF

112.4 KB Created: 2021-07-03 07:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6ca8ba8d61bf4e285d3cd0371731eb94 SHA-1: a1c70b6a7626e53b63ea3eff120c2b157ad1d28b SHA-256: 96b3fc44ea4eec5b3c282102ad65c1ea773afae2262ad071f101f7fe17e544ca
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://laborke.ru/uplcv?utm_term=vertical+pupils+in+humans PDF link annotation
    • http://poorclarescork.ie/images/46995238040.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160955f0b982f7---ladidazamodeg.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13532894470.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/tafagodanul.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/he4ht7l861egl6gj3gc4kp0tdc/mavamez.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160827229e0716---49863610860.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/3572dc9f774057b26f8ef5c57bb9bc76/gufatafilexa.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/2b9b2868c734c28b6bc1c0138f1f84f4/23920472972.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/bb0d84cf5b7d69182802c5b91acb2260/34811976978.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/ba4988a8f822237baa412a5cd05e3337/43339556700.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/48005697595.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/fesebadowap.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/ueostjk3qvm5h4ihlastg52css/fagukevuvefufoza.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/93357405493.pdfIn PDF document text
    • http://ietc-oman.com/userfiles/files/2240392191.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3cf325e1a---moromugi.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/6d43266237e78ad92bcd5bd11c277a95/judopujezuneta.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/77b0f6ba0ab43cfd49e0700b372c3fe8/33977226209.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/qq73a628peb1srqrhh43rhjonu/84413950627.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/makawivonevililefovexox.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/dumajuwefesirikomusobe.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_off0001515b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1515B 19500 bytes
SHA-256: f16dc6a68aae3d125b01ef732a82d3d2f772eec126abe93e60777836d7b5f0e7
font_01_sfnt_off000184a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19CB8 10588 bytes
SHA-256: 3af99406fe48eae3b3127e6482345cc596087227254d18b82fdf82a01c31779b

Open this report in the interactive analyzer, or submit your own file for analysis.