Malicious PDF — malware analysis report

Static analysis result for SHA-256 d478746e5daba2aa…

MALICIOUS

PDF

77.7 KB Created: 2021-09-03 13:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bc2c3592ff590bdace2a406b5c13e7ae SHA-1: 0c72f77e0677086389dfe95e763a2d9afa933188 SHA-256: d478746e5daba2aa5ea30d4518ed99113e2adac7287f893443a97764ff4680ea
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via these links.

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 https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/b02a0ab1161217ffcfdebc3a2807ffb4/16257876484.pdf In PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16088c121d965d---jexifotawotane.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/lawenowu.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c625b224b9---wuletaxizoxivixoxofuki.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/m7nlrid6o0tia9uuhqt7demc7f/52932469318.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/88027239243.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/hsk8rv6dtoj6unad1cbd5fe4ac/wekefenokezuwemudona.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/kamolafumakexixerakodan.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/4iilkp2rej8rb66voad36bo587/79404769753.pdfIn PDF document text
    • https://butagallery.com/userfiles/files/miruxufu.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160776ebe78ecf---58172181713.pdfIn PDF document text
    • https://tsegypt.com/file/2113046991.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/33211735976.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/62011374797.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/82450038263.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/xenuzefodutoxerode.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/bajevazotojate.pdfIn PDF document text
    • https://olterus.net/contents//files/wopekofikotu.pdfIn PDF document text
    • http://riph.pl/userfiles/file/73714318776.pdfIn PDF document text
    • http://barnesfamilyconnection.com/clients/f/f3/f37d50667a1bb99e511e26172889fab9/File/73081318702.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160836cb6f2242---tonojujuwope.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/e0b6693020cd47878d24c925c43d7388/sigez.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/ca5b4e21cbcd1bac7549f17fd7b847ea/82837114991.pdfIn PDF document text
    • http://ithaca1966.com/clients/8/85/85e9e0a76fddb83d7689cebc6ab07fae/File/6202072309.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=defisiensi+vitamin+dan+mineral+pdfPDF 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_off0000cdfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFE 10608 bytes
SHA-256: a364697c1ee2defe0313e3db0b44789df441a77b37b5c6ef35296588e58bc6f2
font_01_sfnt_off0000e63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63F 16600 bytes
SHA-256: 2cec76d5a61296fd3169e474509550b53a0bcc9cb60912063c28c68e9c00fcba
font_02_sfnt_off000110f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1