Malicious PDF — malware analysis report

Static analysis result for SHA-256 602d78af0f204bf2…

MALICIOUS

PDF

80.2 KB Created: 2021-03-02 23:46:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 50234b450b002dac3ac46d95671081fc SHA-1: c14f9f25f144ab645a4f07e1d97bfe44637875f7 SHA-256: 602d78af0f204bf2b54976cadd5a21699ce33f2edadb6ffc8aa581e13f89d813
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://fokemale.ru/123?utm_term=maximum+ride+school%2527s+out+forever+book+summary PDF link annotation
    • https://cdn.sqhk.co/dulinifijal/mlhjDqy/black_friday_deals_online_right_now.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/gjhjb7T/earn_recharge_by_quiz.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/W4WB0qR/easter_island_warfare.pdfIn PDF document text
    • https://cdn.sqhk.co/suwixowefa/WUpmgh5/hide_text_messages_android_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/iirEwWx/used_sofa_set_for_sale_in_karachi.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/fhhajgd/space_shooter_galaxy_shooting_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/j6XQgfP/karasetovonotopojeza.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/96476427168.pdfIn PDF document text
    • https://cdn.sqhk.co/fiduzosi/hji4API/97467094539.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/wazagidonux/what_are_the_musical_symbols_and_their_meaning.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/introduction_to_quantum_mechanics_2nd_edition_solutions.pdfIn PDF document text
    • http://surigel.rf.gd/76342761277.pdfIn PDF document text
    • http://faluzarawajuxos.epizy.com/22294908239.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/32293388631.pdfIn PDF document text
    • http://timavutiziv.epizy.com/committees_in_congress_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/97077140761.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/kenneth_blanchard_books.pdfIn PDF document text
    • http://wulitebajanuba.rf.gd/bivariate_uniform_random_variable.pdfIn PDF document text
    • http://nifibomagogov.rf.gd/31463303156.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/21007029904.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_off0000fa78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA78 5732 bytes
SHA-256: 6bad2500344e80c365e848ec9b15d84b46d9288d12ded5b42cf2c1d836319c95
font_01_sfnt_off00010dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFB 11212 bytes
SHA-256: db37dfe438121caf8061571582c376f2cc467b0bad0ed6f7ab28317782800137

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