Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f76c0763c0cbce…

MALICIOUS

PDF

81.2 KB Created: 2021-03-25 12:38:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cf1f0b173400c7df7ad0184cbf2e8798 SHA-1: 1b0902c5582bbf8c7113c0da803e0db69002359d SHA-256: 34f76c0763c0cbcef8a517f03323805716ff5747f70b46e98ffc7c615baa288a
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 0.9967

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://pelibifir.ru/wix?keyword=don+quijote+resumen+por+capitulos+primera+parte PDF link annotation
    • https://cdn.sqhk.co/vaminika/gcggjdh/imdb_yellowstone_kelly_reilly.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/4iggDgc/gold_rush_3d_guide_season_10.pdfIn PDF document text
    • http://chambrely.xyz/loxesujisusudu36k00.pdfIn PDF document text
    • http://itdiscount.pro/modelo_de_minuta_de_una_empresa_srl85tm0.pdfIn PDF document text
    • http://geosen.net/la_ley_y_el_orden_capitulos_completoftf0n.pdfIn PDF document text
    • http://sacredname.ru/enchanting_guide_wow_wotlkw9l70.pdfIn PDF document text
    • https://cdn.sqhk.co/daviluzabidi/jgejhla/new_top_100_ringtones_download.pdfIn PDF document text
    • http://wisecredit.info/rezufixupt5krq.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/vazepeginzaaai.pdfIn PDF document text
    • https://cdn.sqhk.co/dujovibipu/L4KXdif/wajuj.pdfIn PDF document text
    • http://kamini33.ru/the_secret_garden_2020_cast_listol89t.pdfIn PDF document text
    • http://groshyk.site/big_ideas_math_advanced_2_textbook_answersatx2h.pdfIn PDF document text
    • http://cardioactiveuficiale.site/590481790365k9pj.pdfIn PDF document text
    • http://aycotoro5.xyz/44886703299939od.pdfIn PDF document text
    • http://lnstagram-helping.live/699887575384s41.pdfIn PDF document text
    • http://juilopkiretlo.ru/super_walmart_near_me_pharmacy_hours54q2q.pdfIn PDF document text
    • http://tadigewatogonun.22web.org/android_messenger_dark_mode_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/idFhaa5/warhammer_40k_erebus_meme.pdfIn PDF document text
    • http://tovarzone.ru/7700881638301gp3.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/pegozegi/best_anti_aging_sheet_masks.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/daxizewoxiri.pdfIn PDF document text
    • http://xiwomewumusebif.rf.gd/wonedogagefilunejilef.pdfIn PDF document text
    • http://wiroweri.rf.gd/fuduzadefikimo.pdfIn PDF document text
    • http://befejuzawafuv.epizy.com/direct_and_indirect_characterization_exercises_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/use_in_english_grammar.pdfIn PDF document text
    • http://xopapikalemeb.rf.gd/12158136232.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_off0000fea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA7 5280 bytes
SHA-256: 9baefed493c4705d652505503e259cc29d7ea47269e55efa437d36db38355cc9
font_01_sfnt_off00011090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11090 11260 bytes
SHA-256: ef3ea024d5e9ce3dc843234c2f4297f8309a1d980e0712d5349a7e392be993cf

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