Malicious PDF — malware analysis report

Static analysis result for SHA-256 e13cc14b5d04192e…

MALICIOUS

PDF

78.3 KB Created: 2021-03-15 06:58:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a65c6718d17e201bdc905419f76fa2c SHA-1: 5f16cf1333a7ee655eeaa7dccfe0642f91bb8ee3 SHA-256: e13cc14b5d04192e0937abc818ea15e6b63ec5d790882cde0fa64416569bf3af
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO spamming technique. One of the primary external links is to 'ponafet.ru', which is likely part of the malicious infrastructure. Although no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=football+pump+up+songs+youtube
    • http://wubujonil.getenjoyment.net/ancient_greek_city_states.pdf
    • https://jowajasodosetu.weebly.com/uploads/1/3/4/3/134308851/f6413795b4770.pdf
    • https://jezuvafu.weebly.com/uploads/1/3/5/3/135348480/4698306.pdf
    • https://static.s123-cdn-static.com/uploads/4453102/normal_5fe0768f72039.pdf
    • https://sefagovat.weebly.com/uploads/1/3/4/4/134402874/fufivakaz_dizadavitosese_nuxixivi_kodexegofiluji.pdf
    • https://rofixuninapo.weebly.com/uploads/1/3/5/3/135313709/naniku_vonewigikinu.pdf
    • https://jovonawokemurif.weebly.com/uploads/1/3/4/6/134678447/1180730.pdf
    • https://vefekigut.weebly.com/uploads/1/3/4/3/134391246/7845501.pdf
    • http://nigavereke.mygamesonline.org/ielts_opinion_essay_structure.pdf
    • https://totovipuvo.weebly.com/uploads/1/3/2/7/132740708/zemetaronoxunelelov.pdf
    • https://jaluwaxigesife.weebly.com/uploads/1/3/4/6/134640648/potor-fuwufiz-lazilewudim-magot.pdf
    • https://static.s123-cdn-static.com/uploads/4527747/normal_6002c8e1374b9.pdf
    • https://lapamijivosesez.weebly.com/uploads/1/3/4/5/134507295/411200.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gidibesuxi/vovisixeze.pdf
    • https://s3.amazonaws.com/sazomo/functions_in_excel_2007.pdf
    • https://s3.amazonaws.com/dukexajuj/les_justes_albert_camus_english.pdf
    • https://s3.amazonaws.com/jizubisetebof/crowdfunding_industry_report_2017.pdf
    • https://s3.amazonaws.com/fidefofudi/all_chat_app.pdf
    • http://ralirajuz.atwebpages.com/rurekunadepiw.pdf
    • https://s3.amazonaws.com/pizivurapab/lenupametefis.pdf
    • https://s3.amazonaws.com/xozeb/happy_birthday_wishes_for_girlfriend.pdf
    • http://ritumogadoj.onlinewebshop.net/95445396603.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_off0000f4e6.bin
b1c068dc7bc8de4ea2841660634e81a62bca032ef3f62ba4a331003c8032e515		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E6 5240 bytes
font_01_sfnt_off000106b5.bin
b50275e73883726b70d9878cb892d838bbb63fc3d3d436a07b7411f67d0dea50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106B5 11008 bytes

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