Malicious PDF — malware analysis report

Static analysis result for SHA-256 404bb68391964b4b…

MALICIOUS

PDF

129.1 KB Created: 2021-07-31 10:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 72dc6b034d25fdbbabcaa295f3e0b40f SHA-1: 39ad3442155a26f5e9d9d1b84b9bd2312d5444ce SHA-256: 404bb68391964b4b29973b8bb7b1674149111af9070ec3dea2271c214d2e448b
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 functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely intended to lure users into clicking them, potentially leading to phishing attempts or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://laborke.ru/uplcv?utm_term=kuji+kiri+libro+pdf PDF link annotation
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/r7hkklj57h2po0th3u8u9p1do2/ladorum.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cb7bceaf9---doluxopajerafufozef.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/f00a37fc39089dadd3e39e7ed2bd716b/71467535085.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/f228814fe227d94b0a7bab9a30f706db/laralefes.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/srkflu133cs6ap0pbn4v3obcpn/guxixazokepofuzipirasuz.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/gavotokatarepemegop.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d273266fd0---kaduwitukelumubitizurik.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67402a9c42---66572298972.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb587538f0---41917518548.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021072109181621.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bbe784aca---87197437261.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/16015950762.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/mivibopavasowive.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/df4f511108afdbe45dc27ffd9e21c20e/23382343472.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/ba30832918c4b8641c6c598235f2aa8b/runutofamakanasi.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/36249234623.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/bc9117d58ef66e4425eea3bb585be724/8905424150.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832aba9499e---12221971584.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c564f4239---rumerizukuwituviburilam.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18663 10280 bytes
SHA-256: ff6ba002d0adfe7ad22c8b7095ac2d5c5ecbf1349e29c2a843233bc313bc6fd4
font_01_sfnt_off00019d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D3A 20624 bytes
SHA-256: f8829a8366546fba1b399e1938546bacc6b3a4f93620b7078160bc7e7f8bf423
font_02_sfnt_off0001cf18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF18 3556 bytes
SHA-256: 3040cc5c486cf62585e3137a13172c94c3044e95ccc72739a0861390842acb38
font_03_sfnt_off0001dcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.