Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ba6764e45c6d94…

MALICIOUS

PDF

69.5 KB Created: 2021-09-13 22:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 74f75c344b8883b2881fa6707209de93 SHA-1: 05af01962fe6d7d85ba3547c2488f9a1f583c823 SHA-256: 63ba6764e45c6d94b82fb38c9c1e2e4644b35a292b44bf18449304cad30cd459
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. The PDF_IMAGE_LURE heuristic indicates it's an image-based document designed to trick users into clicking through to an external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://catamma.ru/uplcv?utm_term=how+to+put+music+on+my+android+from+itunes PDF link annotation
    • http://sun-green.nl/ckfinder/userfiles/files/kojobu.pdfIn PDF document text
    • http://bxbrdh.marketsearching.com/upload/files/87569720309.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/46552994959.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/girutazig.pdfIn PDF document text
    • http://sayarbobinaj.com/file/lakodokifoz.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/womoref.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/vvhtr3uiq1k1flp67mhso5n8b6/bikagomixajokud.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/xomepep.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/23490932278.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/7201193753.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/29181096999.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/mizixopiger.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/femakesenodipapobev.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/vasotagixom.pdfIn PDF document text
    • http://gearcon-eng.com/file_media/file_image/file/54631709763.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161320e00b0230---dakevivamaj.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/41461971901.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/werek.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/82340655078.pdfIn PDF document text
    • http://hcstonetw.com/uploads/files/202109031525491947.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/ferolasor.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/79807605568.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/84833761360.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/c3919f4c004c25a2cff1daec301ebf9a/65942810606.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/mizisazamekewilapavo.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_off0000b1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D6 11024 bytes
SHA-256: e4c035cced6d97b9c6eb4a5549f8ad257dfd9b83f074932f367a33d5aba959da
font_01_sfnt_off0000cb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8A 13968 bytes
SHA-256: 37840c41b3eeacd6cd5ad0e9c957b430e5cf9fd13302fba83dc5b15f4fd839ac
font_02_sfnt_off0000ee0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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