Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e295d104a6bc3bb…

MALICIOUS

PDF

77.0 KB Created: 2021-09-14 13:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0435a8f369f8ed708a15a90dee766cd6 SHA-1: 989a1949a4ff4f9f9918acf1c147a3463ce3c0df SHA-256: 6e295d104a6bc3bb92e54f1c788933118954cdb4a33dc92e0b5bb2c0a929dffa
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document employs a password-protected archive lure, a common tactic to bypass security filters by encrypting the malicious payload. The document contains numerous links to external sites, many of which appear to be compromised WordPress uploads or disposable hosting, suggesting a distribution network for malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://chcial.ru/uplcv?utm_term=ss+iptv+download+apk+windows PDF link annotation
    • https://geneolock.com/locktactyuma/userfiles/file/16968725238.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/0ddua28mk3fh2hgca3l0vgacpu/66630032175.pdfIn PDF document text
    • https://egc.ecrom.work/syo/files/8531314494.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/59802269353.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/winubel.pdfIn PDF document text
    • https://hotnewsmd.deca.md/upload/userfiles/files/88694320184.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/97131175380.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/wojugeg.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210914_090506.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/13622878939.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/f5f8d293f61c75c8a5e5faebea92efa2/dudujalanobiwelazowokitoj.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2641920424.pdfIn PDF document text
    • http://fygl.net/uploads/file/011632286867.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/35066860304.pdfIn PDF document text
    • http://quocteanviet.com/img-chamthi/files/zunuganuzetetakovupo.pdfIn PDF document text
    • https://kamhosting.nl/ckfinder/userfiles/files/geguloz.pdfIn PDF document text
    • http://xsteelstock.com/d/files/dawebutososogu.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/napuziliwerejumikegi.pdfIn PDF document text
    • http://adamex.ukrkarta.ua/fckeditor/userfiles/file/7045602977.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/4jbo05habuqnfmngt9acccef4d/jaboleguwodadedozen.pdfIn PDF document text
    • http://polipack.ru/content/file/fademazemururul.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/38798351735.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/moson.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/45083283131.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_off0000c7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE012 10472 bytes
SHA-256: c146225696c4b2d9ee261481aa7ae5af6d8bd3bdcad42e4f1db7d2918d2f0b1c
font_02_sfnt_off0000f7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FA 17816 bytes
SHA-256: 4e94635b5056501fef38a7c9fcac2ee6639aa8c84d9fa757210864327faf882d

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