Malicious PDF — malware analysis report

Static analysis result for SHA-256 8075fc67298400fd…

MALICIOUS

PDF

85.0 KB Created: 2021-03-23 22:20:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc851cb0e1d8699513e5f76baa834905 SHA-1: 9cc181b40a20f93a8146ac612a5aa11e47d322e3 SHA-256: 8075fc67298400fdd7ad2b85f40bf00a022084ce8c5aef0392afb7c0ede27644
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the structure suggests it may leverage embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/award?keyword=pruebas+de+oxidasa+y+catalasa+pdf
    • https://cdn.sqhk.co/dipujabuxiw/5cBZjeX/top_100_music_hits_2020.pdf
    • https://puziwurawube.weebly.com/uploads/1/3/1/8/131871408/mupul.pdf
    • https://cdn.sqhk.co/tibixovoju/nD4YuZ6/oriflame_beauty_application.pdf
    • https://tojezupemizeraw.weebly.com/uploads/1/3/4/6/134629845/xawiniwuvufu_kebotikuwepi_wuwovarefo_zotesajo.pdf
    • http://upgrade4me.com/essentials_of_business_law_10th_editiondh3ex.pdf
    • http://help-copyrightservice.xyz/15883595785qa7up.pdf
    • https://cdn-cms.f-static.net/uploads/4466664/normal_603bcfb1347d3.pdf
    • http://private-channel.site/i_ready_7th_grade_math_book_answersapy1d.pdf
    • https://cdn-cms.f-static.net/uploads/4453118/normal_6058f5649c3e3.pdf
    • http://reduslimitalia.site/14477727979x5tje.pdf
    • https://cdn-cms.f-static.net/uploads/4446923/normal_5fd260edaef63.pdf
    • https://kowagazobavov.weebly.com/uploads/1/3/0/8/130874359/8932df244d.pdf
    • https://cdn.sqhk.co/rusobotakox/Ngigd9N/minecraft_pocket_edition_girl_skins_download.pdf
    • https://cdn-cms.f-static.net/uploads/4369926/normal_60222c6e5f859.pdf
    • https://pajowivi.weebly.com/uploads/1/3/4/9/134904739/8225566.pdf
    • https://cdn.sqhk.co/pigujoxexate/tgjgjXu/73831199341.pdf
    • https://cdn.sqhk.co/tumowara/5jcJHjj/free_photo_video_maker_with_music_app.pdf
    • https://cdn.sqhk.co/pajijolabalu/4gdgcgi/pocket_league_story_2_mod_apk_cheat.pdf
    • http://siondez.ru/61882322141nqe73.pdf
    • https://cdn-cms.f-static.net/uploads/4379230/normal_601f63560dc05.pdf
    • https://cdn.sqhk.co/fejavegiwo/iGgjpvD/lisuzoborujonuginojapiv.pdf
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/c2f0b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/542f2ad6-9c75-4d74-a6e3-c02a7ec7bc38/auto_fundamentals_workbook_answers.pdf
    • https://uploads.strikinglycdn.com/files/42713c12-1191-4a18-b4b0-3a21958debf8/dipitidexelojaxevalu.pdf
    • https://uploads.strikinglycdn.com/files/f1b02ad9-749a-443e-a7de-5f5f70b15b8e/the_little_prince_picture_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffae.bin
10f58dd6017b55b9921ea94c4026125a84ec923a2a01262eaeb1866251980384		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAE 5236 bytes
font_01_sfnt_off00011197.bin
92d219a9c7ec713fc323c5b646caed63943afe109f0043898f5ab24281896cad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11197 11464 bytes
font_02_sfnt_off000136cd.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136CD 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.