Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea628060ff5522c…

MALICIOUS

PDF

75.5 KB Created: 2021-02-26 22:12:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 702f7c19225c3f2778bfcbf90587c3ea SHA-1: 805cc474435c6935897964f4c3e4265e00655a82 SHA-256: 7ea628060ff5522cc8bf08e9a4c763caec16fe38807dbd545c691cfacb0c22bc
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, likely for phishing or distributing malware. The presence of external URIs and the overall detection as a phishing trojan points towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/award?keyword=vizio+e601i-a3e+firmware+update PDF link annotation
    • https://cdn.sqhk.co/namemedoxake/cWQxuhe/60024313888.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451762/normal_60294636a3113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447880/normal_601b32abc210e.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/hgghcgi/what_do_crows_eat_birds.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/CYjjg5w/expanse_series_book_6.pdfIn PDF document text
    • http://godubumoze.iblogger.org/bhagavathi_songs_telugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402014/normal_602b544ee2fe7.pdfIn PDF document text
    • https://cdn.sqhk.co/wutalididow/ieif3dl/vepizarunaw.pdfIn PDF document text
    • http://wifejopoxakobo.iblogger.org/grammar_bytes_parallel_structure_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/fusifanux/hjgihji/winking_lizard_macedonia_delivery.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472198/normal_6004823d8678f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499282/normal_5fc96b42cce3f.pdfIn PDF document text
    • https://cdn.sqhk.co/molodomo/jfOz6TU/15855554677.pdfIn PDF document text
    • https://cdn.sqhk.co/lofakekaf/IihZWha/38689341070.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/avchd_file_format_not_supported.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/88916277431.pdfIn PDF document text
    • http://bobupeg.rf.gd/apache_maven_surefire_report_plugin.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/el_evangelio_de_cagliostro_gratis.pdfIn PDF document text
    • http://tamexajifosu.epizy.com/selenium_cheat_sheet_ruby.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/gizojatifujagirebojav.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/best_free_chinese_dictionary_android_app.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_off0000ea5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5A 5628 bytes
SHA-256: e83444b2fae1b8f51f114d9ff7ab5d9ce89d8849e080433791005647abd6cd32
font_01_sfnt_off0000fd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9E 10256 bytes
SHA-256: fb7e265a7adf8e9749631f5777c13d84553ff9bb77a652ae4ebad56b70d31f3f

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