Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19dfa4cab0d46ea…

MALICIOUS

PDF

70.5 KB Created: 2021-02-17 06:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 4c41c64f280c44c843e13d320972293f SHA-1: 8c5058de1c0697fe46821069e8168e2e7b18d0e1 SHA-256: f19dfa4cab0d46ea0c4fa6aef176fc5dd45fb254061da9e5de5ea8db8aa99eb6
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=the+world+of+the+witcher+compendium PDF link annotation
    • https://rapofureduf.weebly.com/uploads/1/3/1/1/131164295/bedowowux-gelikiwejimun.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/ralop.pdfIn PDF document text
    • http://workshop-fb.ru/pexofafpa3cj.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/evangelium_vitae_portuguesb4pgl.pdfIn PDF document text
    • https://tekebuzegox.weebly.com/uploads/1/3/0/8/130814382/2921288.pdfIn PDF document text
    • http://xxlmature.site/average_and_instantaneous_velocity_worksheet_answersnq73k.pdfIn PDF document text
    • https://pegepigav.weebly.com/uploads/1/3/4/4/134481067/fivodifufigewa_xojapur_xenigetox_riluneva.pdfIn PDF document text
    • http://0fruits.space/legend_of_empress_game_storylineorefd.pdfIn PDF document text
    • http://tramlaweq.online/acrobat_editor_pricevoqeo.pdfIn PDF document text
    • https://birexekexujivas.weebly.com/uploads/1/3/1/8/131858685/bebumuletaxebus_nezanolizi.pdfIn PDF document text
    • http://jefozogez.66ghz.com/79772319710.pdfIn PDF document text
    • https://samivixawudajan.weebly.com/uploads/1/3/4/6/134634686/nafetolewa-zomuviwodu-ferexawufixem.pdfIn PDF document text
    • https://zovakilezogavi.weebly.com/uploads/1/3/1/1/131163957/9416714.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mirepili.epizy.com/what_is_the_weather_report_in_hyderabad.pdfIn PDF document text
    • http://mibexaluji.epizy.com/landfill_gas_management_facilities_design_guidelines.pdfIn PDF document text
    • http://lorenivi.rf.gd/ps2_android_emulator_bios.pdfIn PDF document text
    • http://wojudor.epizy.com/69548634439.pdfIn PDF document text
    • http://zivumimilalak.rf.gd/soul_knight_alchemist_guide.pdfIn PDF document text
    • http://gadivedu.rf.gd/configurazione_alice_mail_su_tablet_android.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_off0000d670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD670 5048 bytes
SHA-256: db209b7f70c2387131f8872bb3cb56e300eb082a2c20da21291d118e08c90b26
font_01_sfnt_off0000e787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE787 11500 bytes
SHA-256: c4db0130fea6534f2f27bc0bf3e1d124655e6e03f52bc90ddc35ee18705c61b0

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