Malicious PDF — malware analysis report

Static analysis result for SHA-256 0549d1294b534978…

MALICIOUS

PDF

89.7 KB Created: 2021-08-01 02:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 436f57ba9d7608dd67ae4f927d43c356 SHA-1: ae9a09f4e8137ed6c4b43708c32b8ee9af3c0657 SHA-256: 0549d1294b534978e2579857cedf67d85d9efe6f62f3a37ed020fd7863ffcc12
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a link farm pointing to multiple compromised WordPress sites and other domains, suggesting an attempt to redirect users to malicious content. The primary purpose appears to be directing users to external URLs, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=how+much+do+kohl%27s+employees+make PDF link annotation
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/c120e78c989fbf785260c1c10f323922/pukizoliso.pdfIn PDF document text
    • https://jagamimpi.info/contents//files/94524308687.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210529131427.pdfIn PDF document text
    • http://amandamaitland.com/images/file/gebewememofewipubipeniwu.pdfIn PDF document text
    • https://mzlpro.com/web/img/podborky/files/87190885166.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/bewijufaxedaleb.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/e84a0e6afd8ccde7935a85efdb6e18df/28253376541.pdfIn PDF document text
    • http://roxburyhs1987.com/clients/63080/File/7317549925.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7db45c1e69---20660797852.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/lonopixedusibaj.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/41428765209.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/126ac80e4e5b09b457e575a6d8051d37/1491390701.pdfIn PDF document text
    • http://myphamasia.net/upload/files/bofogab.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160fc0857b5304---samamujomif.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/37156388604.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d62de8d56a4---12799169547.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/iloct1caniojregra67n5g7dlb/niseninalelaxap.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/devokulalube.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/lutazu.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/rosuzizibotakod.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988c7e2ad48---vodejomu.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/vbvntt6rk5gggkd6f8km455ds5/xepojob.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/f4s746pef2ukn0u8vge7n53pg4/57757085065.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609416a39cb3a---pesidujoxisa.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_off0000f84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84E 18152 bytes
SHA-256: 2385e9a9914bb81d31df5594055ae4e400f4689deb2e4bb1f69be963c85ea288
font_01_sfnt_off000127ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127ED 10804 bytes
SHA-256: 62a70ddb31b76471cd18eaaa9a5543ddfc3af715dd2d8d95d125cf135091e394
font_02_sfnt_off000140fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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