Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ea208f12efedd2…

MALICIOUS

PDF

164.8 KB Created: 2021-02-20 20:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 14373538b74b353b3482f4f4d28a43ce SHA-1: 01fa2f7520ee850a4981fd14745c1d7e70354238 SHA-256: 65ea208f12efedd2a6ba5442be05ff453ebe6500550c95a4f61a27fab9d8ccbb
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though partially corrupted, suggests a lure related to a comic book for sale. The presence of numerous external URIs, including one pointing to 'seumenha.ru', strongly suggests this PDF is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URIs are sufficient indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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/123?utm_term=amazing+fantasy+15+comic+book+for+sale PDF link annotation
    • https://cdn.sqhk.co/jefapukawore/nlhijde/crop_tops_without_straps.pdfIn PDF document text
    • http://tevuvisena.iblogger.org/nixiniv.pdfIn PDF document text
    • https://depumubawaminuk.weebly.com/uploads/1/3/4/2/134236244/40a12f8.pdfIn PDF document text
    • https://cdn.sqhk.co/gexedamej/khdu9Mr/stacked_washer_dryer_combo_used.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/Bjhhjjg/mechanics_bank_arena_bakersfield_california.pdfIn PDF document text
    • http://pivogafude.22web.org/vlookup_example_between_two_sheets_multiple_columns.pdfIn PDF document text
    • http://vawuzusodiguse.iblogger.org/73541195828.pdfIn PDF document text
    • https://cdn.sqhk.co/medipevagopu/Highjgi/8708382027.pdfIn PDF document text
    • https://musevurimimurom.weebly.com/uploads/1/3/4/7/134711136/6720608.pdfIn PDF document text
    • https://gugabezari.weebly.com/uploads/1/3/4/5/134577353/8abc33.pdfIn PDF document text
    • http://xufunuduxatene.iblogger.org/biharmasti._in_2017_movie.pdfIn PDF document text
    • http://ziwavabewite.66ghz.com/17883860990.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/ijgejbW/11391809862.pdfIn PDF document text
    • https://xokefinodoju.weebly.com/uploads/1/3/5/3/135316617/42330d2d764d.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/fofeguj/what_is_rainsford_like_in_the_most_dangerous_game.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/6534412216.pdfIn PDF document text
    • http://gelulunex.epizy.com/starcraft_brood_war_cheats_pc.pdfIn PDF document text
    • http://lupevara.epizy.com/gnossienne_guitar_sheet_music.pdfIn PDF document text
    • http://xanunomoz.rf.gd/limadigoxana.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_off00024748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24748 5724 bytes
SHA-256: e8689ce6c0a6ee72ad64d92e74e08e278a88c9d9713dc8f32158115ae52a2785
font_01_sfnt_off00025adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25ADC 12624 bytes
SHA-256: 4be04261d05b2a410871699f1a6217dccbdde099152b0d0a0baf181de6ba32cf

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