Malicious PDF — malware analysis report

Static analysis result for SHA-256 072a5e607486bf82…

MALICIOUS

PDF

82.9 KB Created: 2021-09-15 16:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b69ec81b4e0111194391850e441e2fab SHA-1: e1baf8eae1c5d8fe9872157eae8fab33137751d0 SHA-256: 072a5e607486bf825b7cd405a069b818d332e5d3b234327a54f9a047d5e76cf3
156 Risk Score

Malware Insights

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

This PDF document contains a link farm, with many embedded URLs pointing to various websites. Several of these URLs are hosted on compromised WordPress upload directories, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://myshiou.com/uploads/files/202109131724562761.pdf In PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0e30ab196723860f69a9645ebd2be0e6/17609743365.pdfIn PDF document text
    • http://stroyindustry.com/userfiles/file/xetatisanasowi.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/83247129943.pdfIn PDF document text
    • http://www.enredmail.com/templates/files/idCliente_/file/79157954048.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5e7c98dd4---88577296021.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/78741234551.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/60147348379.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16310572656514.pdfIn PDF document text
    • http://phunphu.com/userfiles/file/jevakasafotu.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/3093932563.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/1364563777.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/79364745004.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/guwepevi.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210913214137_r6y52j.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents/files/6892021284.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/34968188836.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/56863978875.pdfIn PDF document text
    • https://taucaotoccatba.vn/images/news/files/xogosapaso.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/7p23uhn83mcictopcodkgqd05u/rurojigorona.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/vumeke.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613299d0c8105---50115630932.pdfIn PDF document text
    • http://cnsgawefgl.netsociality.com/upload/files/56051052898.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/65738515316.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=3d+racing+mod+apkPDF 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_off0000e076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE076 10580 bytes
SHA-256: 72527a7969d12f282b272f45dd9d29b598b83ee966f9d086c71033412c0c259b
font_01_sfnt_off0000f848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF848 17532 bytes
SHA-256: ad0ecb309053ecd8bbfbe3c5aad1a61450def03ed9cbb40895a53af65eebf16a
font_02_sfnt_off000125df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1