Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea9d7b16951a5de…

MALICIOUS

PDF

77.1 KB Created: 2021-09-17 08:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9e0b6079c9d387eafc1140feadfd8450 SHA-1: 28e53cc8e79c46375b736360bf65976a4fa37d2a SHA-256: 6ea9d7b16951a5deaa4b302bf97065fcdb5508289c396be8716c33eeab0ce4f7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 5

  • 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.
  • 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=us+2013+swedish+movie+watch+online PDF link annotation
    • http://stylekd.ru/files/saviwezidusavonap.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/dakosotenim.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/36928183276.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/a0f860c888d18cda02cf7785ab3a98bd/tezokuwiv.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/8538539297.pdfIn PDF document text
    • http://michelschuurmans.nl/images/uploads/file/vutujalugum.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wewavovobawobi.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/98711578147.pdfIn PDF document text
    • http://hyundaidongdo3s.com/images/files/rezemikab.pdfIn PDF document text
    • https://airflow-skateboards.com/userfiles/files/punuvel.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/67383549836.pdfIn PDF document text
    • https://ayurmitra.com/files/file/tafirexomedozape.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/diseb.pdfIn PDF document text
    • https://eastoncn.housemember.com/uploads/files/subopeforewuguripiliwaz.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/vafumosediwedibo.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c82625e362---74069519558.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/8230500838.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/36151570568.pdfIn PDF document text
    • http://wwsm-hk.com/files/file/palibev.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/dorepepubugekotudobu.pdfIn PDF document text
    • http://humansharehouse.com/userData/board/file/wotarerikasokibuzuno.pdfIn PDF document text
    • http://boldogelet.hu/media/52860146884.pdfIn PDF document text
    • http://ahzgbh.news-read.com/upload/files/wisapuselupegobebul.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42895467814.pdfIn PDF document text
    • http://contextuae.com/resimler/files/99915614181.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/muxiderodikulobubisaju.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/16668721458.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_off0000c743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC743 11160 bytes
SHA-256: 7ab46c904bc9fde94b8f3475bd6aa220c79243964bb88f83e8be22bc90ffdbcb
font_01_sfnt_off0000e152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE152 17464 bytes
SHA-256: 4fd410e61d960dbe4ed3956c40cf344941d10a6a7a6d160c3636dfe50f3887fa
font_02_sfnt_off00010e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1