Malicious PDF — malware analysis report

Static analysis result for SHA-256 3752387de42c1eb9…

MALICIOUS

PDF

82.7 KB Created: 2021-09-14 06:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b555330230b0005cd7259c77b2b2f91c SHA-1: 6d125750167522c9f40e9e12c9fd281205a8c551 SHA-256: 3752387de42c1eb964348e7ddaa1ef8cd50bf935cc8f66c5e680efd28802d3ca
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised websites, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/86516028982.pdf In PDF document text
    • https://toananhmedical.com/uploads/files/88278818860.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/16292729712.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/5a9d21a1b3be1db497bd38a4b0625994/xazedapamuxamovifimafeku.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/xudixapudibebufomusul.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/4ef066c452acf85928253f9a9ebcc0a9/31805866544.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/xafevanex.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16130077c43dff---tadujekagebarepe.pdfIn PDF document text
    • http://indemo.pl/Image/files/megolemavosipusasek.pdfIn PDF document text
    • https://duongthuy.net/userfiles/file/gupavu.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/40g99th3r2dqq2r64jrfpgtatc/veveveriru.pdfIn PDF document text
    • http://xn----0tbbbfo0f.xn--p1ai/userfiles/file/warurixipaled.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/64628184036.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613880bc756a2---xoxetapizot.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/kinatibulawonav.pdfIn PDF document text
    • http://radiopoint.cz/userfiles/file/11395111981.pdfIn PDF document text
    • http://marklaliberte.com/fckupload/file/nifulutunarajatepenafeza.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/duvikeduzunixubugomopa.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/21636573930.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f784b75886---25279430904.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/87534307224.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613600765fef6---55043442760.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/51599825986.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+transfer+big+files+from+laptop+to+phonePDF link annotation
    • 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_off0000d8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F0 11020 bytes
SHA-256: 3f984161978ca30c870109764e366794e4ccfce23080e98f3c0ee42cf40f0572
font_01_sfnt_off0000f22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A40 19600 bytes
SHA-256: fe207bed1e3938429c44400576361d3c524410aee48247512a903376df8d906d

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