Malicious PDF — malware analysis report

Static analysis result for SHA-256 7932cbe9f260e640…

MALICIOUS

PDF

79.3 KB Created: 2021-02-06 11:41:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fcae5252ecb68f58e0462c4d7360c09c SHA-1: 9b88059c4e15f6642deda0a034b6989fcb8a7565 SHA-256: 7932cbe9f260e6404e5f4c7bb00296ab28a81ec48e3199a7283bbb60f4643918
126 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to 'Jersey country by country reporting notification', likely a lure to encourage clicks on the embedded URLs.

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://seumenha.ru/wb?keyword=jersey%20country%20by%20country%20reporting%20notification PDF link annotation
    • https://cdn.sqhk.co/mewobonovagi/jfgcZsd/write_short_notes_on_computer_memory.pdfIn PDF document text
    • http://visatog.22web.org/cerebro_y_conducta_libro.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/kdhc2ia/21828472204.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvomuvugu/ehcghSt/my_talking_monkey_app.pdfIn PDF document text
    • http://akvatehnika74.ru/52856425122n4se7.pdfIn PDF document text
    • https://cdn.sqhk.co/wexapitode/jgjGgjb/yandex_money_transfer_to_bank_account.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/hgujajb/72762199557.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/hdJP3AE/wumoxunojo.pdfIn PDF document text
    • https://cdn.sqhk.co/towojutal/j6Sigjc/bagofuvedubebedifa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://salulasalanegox.rf.gd/bluestacks_3_free_64_bit.pdfIn PDF document text
    • http://bakutogigu.rf.gd/zaletokeb.pdfIn PDF document text
    • http://dekixugo.epizy.com/95912175550.pdfIn PDF document text
    • http://fifomivosa.rf.gd/34250382705.pdfIn PDF document text
    • http://dikekonigexixa.epizy.com/chronic_diarrhea_guidelines_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA81 5264 bytes
SHA-256: dbfb0292887898133f3fd6824c3c239f736e6c8860d7729d6bbfd80a6d8e9bf8
font_01_sfnt_off0000fc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC78 11188 bytes
SHA-256: 9ce87cb270d58520dd1f03f9ddab0b5644c2a23d7d7faf5f438ee52c265ce464
font_02_sfnt_off0001218f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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