Malicious PDF — malware analysis report

Static analysis result for SHA-256 d004760c99032e05…

MALICIOUS

PDF

89.6 KB Created: 2021-10-10 17:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: ad08cd1e1c59e87315b0b658575291ec SHA-1: 40f04e53ed0068ff87acd0407d3b1151d070b0d5 SHA-256: d004760c99032e05d76feb403326b2f0bd2e5bb4b35b089f955f9cf9d0202099
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded JavaScript and numerous external URIs suggest the document is designed to redirect users to potentially harmful websites, likely for phishing or to download further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the idea that the document is part of a campaign to distribute malicious 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
  • 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://laborke.ru/uplcv?utm_term=cover+letter+examples+data+analyst PDF link annotation
    • https://canoe.ro/Extras/ckfinder/userfiles/files/damutagufanarul.pdfIn PDF document text
    • http://coniperfumes.cl/js/ckfinder/userfiles/files/26807762587.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/tivasikutamapimemuker.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/godinoweluvamakikekepe.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/58554642788.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16158474b87cbd---64371995375.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/pelavoseri.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/13084038890.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/27307835589.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/53683207407.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9d03f3ef1---71300109111.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/14284949936.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/52448486783.pdfIn PDF document text
    • http://maksimetall.ru/files/26424883654.pdfIn PDF document text
    • http://sjmhospital.org/files/js/ckfinder/userfiles/files/lubovoj.pdfIn PDF document text
    • https://it-remarketing.pl/app/webroot/media/files/zokesurebewuwidazukugi.pdfIn PDF document text
    • http://hanifeugur.com/image/files/74958284928.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/36882460977.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613f12762fb8d---dulejakatanurivegejedo.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/80264313542.pdfIn PDF document text
    • https://tspinstruments.com/cache/fck_files/file/93877353755.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/nolizipabuvefelawota.pdfIn PDF document text
    • https://ww150002.linebot.net/upfile/files/20210920201051.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/manuxatepuzaxezuw.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/31093889883.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_off0000f722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF722 18940 bytes
SHA-256: c05bfe042dd0ea11d27bb95270a236cf1c1747ef40b5a2129dc1b228a4961466
font_01_sfnt_off00012714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12714 10772 bytes
SHA-256: 7f38dc82c02fe5c5619097b8b8113d11446c3f2d74ad89d8d6bc1eb09ee8c626
font_02_sfnt_off00013ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1