Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec240b41859846f…

MALICIOUS

PDF

74.9 KB Created: 2021-02-10 04:27:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 17a750e6f3a82051a7f2db9cf6b31db9 SHA-1: af04ac6449d893ecbdc5556fd334676a6eeb19fa SHA-256: 9ec240b41859846f49211cfb766e483f34ebab9cd42e11995260b8969752e69e
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm designed to host malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent, likely related to phishing or malware distribution. ClamAV detection further confirms its malicious nature, classifying it as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/123?utm_term=marvel+future+fight+apk+whale PDF link annotation
    • http://1cats.space/blank_calendar_jan_2019_templated2m01.pdfIn PDF document text
    • http://glossywp.online/fupomorusalilawodupujowi6685u.pdfIn PDF document text
    • http://kayikciakademi.com/fast_food_cooking_restaurants_listxa1o3.pdfIn PDF document text
    • http://ogranicbio.fun/85934199621acpyr.pdfIn PDF document text
    • http://thiswaytovogue.com/14787893016c6wh7.pdfIn PDF document text
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/476706.pdfIn PDF document text
    • http://natorg.fun/maxwell_s_equations_in_word_formb04v0.pdfIn PDF document text
    • http://thedefenseforge.com/dance_punjabi_song_freeluf8g.pdfIn PDF document text
    • http://digitalcalakk1.xyz/9413469008689wvf.pdfIn PDF document text
    • http://goproonly.com/old_tamil_songs_free_download_zip_filelpg35.pdfIn PDF document text
    • http://rutopadazemed.22web.org/list_of_mathematical_symbols_with_names.pdfIn PDF document text
    • http://viewcreditscore.info/analyzing_scatter_plots_worksheet_answersfe62p.pdfIn PDF document text
    • http://rusherx.studio/las_fresas_estrienklnwi.pdfIn PDF document text
    • https://wufisosudima.weebly.com/uploads/1/3/0/8/130874090/1240323.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/kigavanus/tigunabanis.pdfIn PDF document text
    • http://kofezinidabefu.epizy.com/74324765790.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/tasupuxogaluroretiv.pdfIn PDF document text
    • http://vofofoduwegakuv.rf.gd/bluebeam_revu_extreme_slip_sheet.pdfIn PDF document text
    • http://jabepujun.epizy.com/28179404943.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/rosary_guide_mysteries_english.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/fishing_report_daytona_beach_news_journal.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_off0000e6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F4 5208 bytes
SHA-256: 3ce68f4e4ca9a68a51aee0fe2d71175863de386627973a546448aba819b42d1f
font_01_sfnt_off0000f8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C9 11196 bytes
SHA-256: 3dce9b6b7aa94ac3cde79fc3e3eb2fa6c0114b8322e7ca4c4e9d7e8f242d3c88

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