Malicious PDF — malware analysis report

Static analysis result for SHA-256 604eebda90f2dbbe…

MALICIOUS

PDF

88.8 KB Created: 2021-07-20 07:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 69e3f4c2b53d712cdf306e742775430f SHA-1: ca7f54c15dc24d57570a11c61b82ab02337f77fb SHA-256: 604eebda90f2dbbea69341022a448c02e590f7ec2491a1216814d8e4b4e3f20d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of numerous distinct hosts and URLs indicates a broad phishing or malware distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/48rb52prrp22i9f9vaihigk800/gokamemewozoxazutefom.pdf In PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/463vfd5n3710dj9f1g0qkshnq2/14315335365.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/ri83fgiuu9c7t3irios0f32mai/35188374409.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160897738942be---85133203846.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/4di1r939cg80ljg32cdsets5nn/zevurorigos.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/bimofoxajo.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9afb2d7af---85326462718.pdfIn PDF document text
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/22533567362.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/tokavojozegusi.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808fb3d12a3---janufajepogumimozim.pdfIn PDF document text
    • http://ruilong-ironwork.com/CKEdit/upload/files/91487197614.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/1249502399.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/83249109473.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/80740806207.pdfIn PDF document text
    • https://activepymes.com/pub/file/pimepemozifasedujodawaz.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/86182601762.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/4ccih0dv99uh6ktphhqe6m3hdl/xubilagozaxizixatulib.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160dc378ba7f28---97662593879.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents//files/37648429149.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/4apnae80ge4dplgpmoqabf9lg0/62441466420.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f665fc0419---80869522032.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/72aaa3f7bd837e57fb545598ab5f4483/40190058638.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/t6u3s9se44qtfas54rjb1olsnj/98958103451.pdfIn PDF document text
    • https://www.lloydsunder30s.com/ckfinder/userfiles/files/pebax.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd84f6c315---vonojolad.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609e244f4c6b8---xawedutemedul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=outer+banks+season+2+release+datePDF 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_off0000f5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E5 17976 bytes
SHA-256: 523173759fdb206f36ddd2f66fae332217de2418e00a600d9fb1900be5c03ef8
font_01_sfnt_off00012521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12521 10628 bytes
SHA-256: a202c15ee4789abea9f28ca40fc1b8edefd93caab020d5f1bf4582e6a6ad949f
font_02_sfnt_off00013db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1