Malicious PDF — malware analysis report

Static analysis result for SHA-256 95509e374f64f211…

MALICIOUS

PDF

101.2 KB Created: 2021-04-06 08:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf2eafee94d3cf2c060e6402ab6c9014 SHA-1: b93b17a3498b1ef5a5fe9840fe2e44cfca9c316e SHA-256: 95509e374f64f211c397777dfd6873df4bc1002e852b3b91130b089dfceb246e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic firing for a PDF link farm. The embedded URLs and the ClamAV detection indicate a phishing or malicious intent. While no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/award?keyword=glossary+of+film+terms+pdf
    • https://wezoduvum.weebly.com/uploads/1/3/4/0/134096245/xopexibidizeribor.pdf
    • https://gajabalavira.weebly.com/uploads/1/3/5/3/135347595/5c2f40103c3.pdf
    • https://webesamogamafi.weebly.com/uploads/1/3/4/0/134012635/8950319.pdf
    • http://pusejukaxotip.22web.org/juzadexak.pdf
    • https://mefosenide.weebly.com/uploads/1/3/4/7/134715399/zodevi.pdf
    • https://vizodifoberesin.weebly.com/uploads/1/3/4/9/134900429/5758550.pdf
    • https://motabuwupogofe.weebly.com/uploads/1/3/1/6/131607229/wawujagakibubu.pdf
    • http://rafusunebaper.iblogger.org/96934640953.pdf
    • http://rejusike.iblogger.org/english_speaking_online_course_fees.pdf
    • http://gebojiwikidavu.iblogger.org/xipidabowivejawuvikawik.pdf
    • https://nugenezeni.weebly.com/uploads/1/3/4/6/134632238/nunivodozipibap_jijitasevedab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sosedowogizobi.rf.gd/house_of_usher_2008_izle.pdf
    • https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_e2fb9f298b4f4de78b73988a14f79a72.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b9d617fa-24f2-4f68-8125-e3dd5df009a2/nordictrack_c700_folding_treadmill.pdf
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_132413281f434b668e4260ac3226e0f7.pdf?index=true
    • http://lizaduguxo.epizy.com/58728228033.pdf
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_e789801d5bd34e46849d06fe2ce96ea7.pdf?index=true
    • https://938a05da-450f-421e-a59b-0448473a402a.filesusr.com/ugd/cb5dea_9262c6d6cc1246dc97c2642dd059717b.pdf?index=true
    • http://welolazudadiv.epizy.com/koselapesusuwej.pdf
    • http://xawoforusur.epizy.com/antrenmanlarla_geometri_1_cozumleri.pdf
    • http://famekemij.epizy.com/carcinoma_epidermoide_de_cervix.pdf
    • https://uploads.strikinglycdn.com/files/b55f52b4-4b52-46db-b7a6-b2477a2c3f0c/garowu.pdf
    • https://uploads.strikinglycdn.com/files/74e0653c-d527-4254-92ac-350d6204f21b/32803584669.pdf
    • https://uploads.strikinglycdn.com/files/0339b6a4-0286-4fc4-95d2-62ba6e07dc4e/the_power_of_prayer_book_em_bounds.pdf
    • https://uploads.strikinglycdn.com/files/9df2ad31-313d-4005-b194-083f70d34aef/how_to_get_100_in_red_dead_redemption_2.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a37.bin
bbecabef0690be5dd2fb8e648e0f34f764731d2f308055bf680476d80472f5ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A37 5320 bytes
font_01_sfnt_off00014c48.bin
183a8dca002c679223ec104dd79b494ea7e5e241b2af33dfce7e832cf9d7b938		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C48 10976 bytes
font_02_sfnt_off000171d9.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x171D9 16204 bytes

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