Malicious PDF — malware analysis report

Static analysis result for SHA-256 495f39c81c230d4f…

MALICIOUS

PDF

75.0 KB Created: 2021-03-15 05:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0bb9a52fdb6e60827c18abf7da3848e8 SHA-1: 121cbc56722653ad59da35e820489cdd69c95d2b SHA-256: 495f39c81c230d4fd36a44078f627605e7f91368bda4a087a25a917b953820e7
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware delivery attempt. The document body, though heavily obfuscated, contains references to '70-410 installing and configuring windows server 2012 r2', suggesting a lure related to IT certification or training. The presence of numerous external URIs, including one pointing to 'ponafet.ru', strongly suggests the document is designed to redirect users to malicious websites, likely for credential harvesting or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=70-410+installing+and+configuring+windows+server+2012+r2 PDF link annotation
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/vatumabo-pojimuta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482189/normal_6032cbcb633d0.pdfIn PDF document text
    • https://jevijoju.weebly.com/uploads/1/3/5/9/135978445/tudimo-lafarafetiko-tapururan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443803/normal_5fe093390cab3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493221/normal_60308fcf85d64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379220/normal_600b05420eca3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424011/normal_6039be278d1eb.pdfIn PDF document text
    • https://zusikazokek.weebly.com/uploads/1/3/1/4/131453156/8776277.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lezegunotoxom.rf.gd/english_reading_book_free.pdfIn PDF document text
    • https://1b3e2d6a-0348-4772-9bb2-16e56a761455.filesusr.com/ugd/7bcf02_7f21ca21751149718e4a56d4fe9de2d4.pdf?index=trueIn PDF document text
    • http://xipitidugizen.rf.gd/breakup_image_shayri.pdfIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_fc2eac5398b94c16af9c1331636c9c48.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/742ed0e6-7eb4-4298-bb63-07d934c53c81/xekufomifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/138ce284-8c58-4044-8ace-c0e073f20d4f/line_6_spider_v_240hc_mkii_head_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97b0fed2-8b2b-437e-a23f-2615e3b56f18/learn_electronics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/909d253e-fc90-4fe0-a89b-cf6e6d83d25f/the_hunger_games_mockingjay_part_2_watch_online_in_hindi.pdfIn PDF document text
    • http://tabijuxez.rf.gd/chemistry_notes_for_class_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaf0ec92-76c1-4fd2-97bd-58e68d475cd3/zopaxinut.pdfIn PDF document text
    • http://mopasumugenivev.rf.gd/gm_food_advantages_and_disadvantages.pdfIn PDF document text
    • http://deroselewem.epizy.com/get_here_sam_smith_sheet_music.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B7 5772 bytes
SHA-256: 3697dbd275527123ba66745cd6e91b455bcbe24e1e3624bc05cd9af7f44e33c1
font_01_sfnt_off0000f99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99D 10964 bytes
SHA-256: 0283a05dca932cc27864b85bf71fa938fb6abd9b7a901622632082b6bab69b44

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