Malicious PDF — malware analysis report

Static analysis result for SHA-256 04964469e9e504a7…

MALICIOUS

PDF

89.8 KB Created: 2021-07-07 22:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2170d4dc717a1e645bd85ca4ff75cb36 SHA-1: 3254c9a638c27e097e30989788533268f92780f9 SHA-256: 04964469e9e504a74da7b42477f1bb07619b7b1f3dfb5b5982faf56f5a792230
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The primary purpose appears to be directing users to potentially malicious external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bd6407957---nonatedexixutatuvubej.pdf In PDF document text
    • http://aps-mes.com/files/file/31801856386.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/79897709517.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/ce048f85113a8cdc85e79e25262a71c5/filisizukeseje.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88087a063a---45927082829.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/06/files/210620011008.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/fa76f4a4d45557944075b61353559060/pelivufigasosakudukuwij.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/vnbg5093pfmc1jaefisv4gi7m7/tilukepefezib.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/c1e3a5ac0c89d72271ba2bf5cebd2116/sijamaraw.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/kesarenezepuzeja.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210629162497611251.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/1daa2d88c07d01ed4a25209402a3a9f5/xekazinexenebud.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2cc35949a---rumegegok.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/81597183973.pdfIn PDF document text
    • https://eberli-medical-supply.ch/upload/file/59844183570.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/70287188756.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/65966452262.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfdcde4927---9706033355.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c985c9c6db6---52194933504.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/monudatidunopudumavavusa.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a074e94dbc1---97013456402.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b301c33efc2---529709013.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=fusion+360+obj+to+solidPDF 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_off0000fd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11585 17000 bytes
SHA-256: f4af5781e49639cb0e38173f48d05bef4f896685a9b947ed215e2073d02369cd
font_02_sfnt_off000141fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141FB 10656 bytes
SHA-256: 3e2ddf15a3f54644dc9dbd2931b9df2d67d8b44e8504426e880ebcdc5784cbc7

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