Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7b867b9eeac26c…

MALICIOUS

PDF

74.0 KB Created: 2021-04-18 15:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 22bb65b74b666eb888232a6ce7f50ca3 SHA-1: c5a59e9544c8c372a85c081983fde32d2ee40eb9 SHA-256: 2f7b867b9eeac26ceb3bebab977c979c49ba10bf7fe5eafeb7082193e5d78f76
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://gimoguvi.ru/strik?utm_term=xfinity+x1+remote+control+sound+bar PDF link annotation
    • http://ritegifufefut.scienceontheweb.net/alif_novel_episode_download.pdfIn PDF document text
    • https://riveveketudoj.weebly.com/uploads/1/3/4/7/134706505/1404120.pdfIn PDF document text
    • https://gefimopawudomew.weebly.com/uploads/1/3/4/0/134017284/janediluj.pdfIn PDF document text
    • http://bomisedoxu.mywebcommunity.org/bankers_adda_current_affairs_january_2020.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/mandalorian_language_alphabet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gamovomubapo.rf.gd/19179644273.pdfIn PDF document text
    • http://zepuwiz.atwebpages.com/41654024700.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/36919369820.pdfIn PDF document text
    • http://napamewa.atwebpages.com/22837698755.pdfIn PDF document text
    • http://zapusov.atwebpages.com/57043429355.pdfIn PDF document text
    • http://tuwigugu.rf.gd/sda_calendar_of_events_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/android_studio_sqlite_primary_key_autoincrement.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/23399033567.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/ecommerce_website_templates_bootstrap_free.pdfIn PDF document text
    • http://samanofi.epizy.com/latamepisinidodexixejaw.pdfIn PDF document text
    • http://dekidad.epizy.com/43884997239.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/cannibal_holocaust_hollywood_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/the_accountants_standard_report_for_a_compilation_service_would_not_include_a_statement_that.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_off0000e22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22C 5508 bytes
SHA-256: b9689ec2b2768925cf3af0b885b31e2941c8bbeceefbc10a5dedb48fb15b19c6
font_01_sfnt_off0000f4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E4 11200 bytes
SHA-256: fad69ffd3118e3e9fd7c9f6a248b56dd9bc1e04fff0fe3b941eb004a82186d6a

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