Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ebe265f6a85a66…

MALICIOUS

PDF

74.0 KB Created: 2021-03-29 00:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26cad7939abd221555f4bac19fdcfce7 SHA-1: 24f93bc528e960d83a359fb558e5bbb8aa794d17 SHA-256: 00ebe265f6a85a66519a58f9adaf4a4f8d10115140c054289ff5a072165781ba
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious workflow designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/award?keyword=synonyms+list+with+meaning+in+tamil+pdf+free+download
    • https://jetovalanowu.weebly.com/uploads/1/3/0/7/130739462/sazixevowabitulox.pdf
    • https://xinosete.weebly.com/uploads/1/3/0/9/130968926/setilu_jebedoki.pdf
    • http://bestunew.xyz/which_is_a_good_central_idea_statementb1xql.pdf
    • https://nalodewemutut.weebly.com/uploads/1/3/1/1/131164475/29c85.pdf
    • https://lafotasenobofow.weebly.com/uploads/1/3/4/6/134675597/7412179.pdf
    • http://wordsidepost.top/guideline_tb_whorygup.pdf
    • https://kominalekawer.weebly.com/uploads/1/3/1/6/131636772/1e9cd2e348063c.pdf
    • https://bodijoso.weebly.com/uploads/1/3/1/3/131380183/1b28ec74de566a.pdf
    • https://zejobivajetipud.weebly.com/uploads/1/3/0/7/130740466/2598669.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_25507e76aefb473697474497603edab8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/38258b93-1708-4b54-bb32-f9c7f50e321c/lista_de_verbos_en_ingles_en_pasado_presente_futuro_y_participio.pdf
    • https://uploads.strikinglycdn.com/files/06c814ef-cd82-4a29-8777-b8d78be7d31b/62454135640.pdf
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_312911edd62344168f094c423f4b4445.pdf?index=true
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_b557d16eefb342c2b9cbe547bfabae92.pdf?index=true
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_d0c6a4cea77e405e99e5fe41596868a7.pdf?index=true
    • https://50b7e5d6-ab0e-41ff-bbcb-47d024e5c277.filesusr.com/ugd/45d8ab_5f2e252e43bf4ce69993868c00ba78f6.pdf?index=true
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_5d30379bcd0c4a4d8453208df5e4ff39.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5175f03d-efa3-4105-9747-f252b0eea802/62657111533.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1f3.bin
8ac67492701d4936c8706d2bfb699cad88b7bdaa3e557cbac4b137afbaeca188		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F3 5752 bytes
font_01_sfnt_off0000f57e.bin
c1bb2daa460a831e40029d0189b9204fb271c95428d9f5cfc19109b503c6c2f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF57E 10816 bytes

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