Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d313d0343660aa6…

MALICIOUS

PDF

95.3 KB Created: 2021-03-17 22:08:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 82fd17de5f8bddab45a22b5735f52b27 SHA-1: 2a782cc6f8bc8055a2c165350474a74bc0f41ce5 SHA-256: 0d313d0343660aa6469a78256f362cea81ff9bc3c762284e4bd55352a1832c25
126 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, with one specifically pointing to a phishing domain ('leonvi.ru') that is likely intended to trick users into visiting a malicious site. The PDF's structure and embedded links suggest a phishing or link-farming attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=inteligencia+emocional+porque+es+mas+importante+que+el+cociente+intelectual+pdf PDF link annotation
    • http://keniworu.mywebcommunity.org/bebop_3_macmillan.pdfIn PDF document text
    • http://mamuxorap.getenjoyment.net/kelisimatut.pdfIn PDF document text
    • http://sotipidikukunow.getenjoyment.net/accounting_and_finance_interview_questions.pdfIn PDF document text
    • https://ralevenewuw.weebly.com/uploads/1/3/4/4/134464099/4672640.pdfIn PDF document text
    • https://suguturame.weebly.com/uploads/1/3/1/4/131438741/3294096.pdfIn PDF document text
    • http://joweponula.mywebcommunity.org/66956781131.pdfIn PDF document text
    • https://vaxuzumop.weebly.com/uploads/1/3/4/8/134870956/ba21c032.pdfIn PDF document text
    • https://benelorixoxik.weebly.com/uploads/1/3/4/3/134341896/jasura.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/jegilak.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/fujitsu_halcyon_dc_inverter_reset.pdfIn PDF document text
    • https://tovibimatajo.weebly.com/uploads/1/3/5/9/135963052/kabule.pdfIn PDF document text
    • http://mibemuxagegija.mywebcommunity.org/how_do_i_change_the_language_on_my_sandisk_clip_jam_mp3_player.pdfIn PDF document text
    • http://fanilepitas.22web.org/somuwubisefidovakelu.pdfIn PDF document text
    • http://mebosopevux.iblogger.org/wonder_novel_text.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/sejikemogelajewusug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50fa544-32c1-4911-8e34-316ff2dc77fd/beach_fishing_tackle_for_sale.pdfIn PDF document text
    • http://lumigetutiburu.epizy.com/zeluxorewaz.pdfIn PDF document text
    • http://jirabumibami.epizy.com/dafipedibozetina.pdfIn PDF document text
    • http://bigofufujenu.epizy.com/62920222020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc117d79-d112-4b49-a80a-05093e5b1008/new_yorker_magazine_subscription_best_deal.pdfIn PDF document text
    • http://melamefi.rf.gd/photodetector_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82b68c0b-8213-416d-a57d-9205acdc66fa/deputog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ad08f9-c953-4b8d-9220-b5335bfe5290/how_to_find_secondary_data_in_research.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF3 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off00011bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD8 5536 bytes
SHA-256: d841fb4f94f1ceb6ad7a79998326d90eaa568d54f18a317a68f05ed92dcb3a96
font_02_sfnt_off00012e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E89 8532 bytes
SHA-256: 96c67f6f25291ac1cb95cbd31158ea9687f3a26a106c092b04a829316f52b68d
font_03_sfnt_off000141fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141FE 12796 bytes
SHA-256: db30ab571bf7ccef36a8e5feb51575e185bfc27e01c3a8a8183b6363c0f2c683