Malicious PDF — malware analysis report

Static analysis result for SHA-256 078982b024339140…

MALICIOUS

PDF

75.7 KB Created: 2021-03-16 21:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8a45e8c77c82c4f203c2faeb4a3c2ff SHA-1: 196e92a1ec4502f98d54c3e44296ea029988af43 SHA-256: 078982b024339140810960b46df66aac6a6889272010b0bc47b1e9efaa707859
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a phishing or malware distribution scheme.

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://ponafet.ru/strik?utm_term=volume+of+prisms+worksheet+pdf+answers
    • http://bottlechainworld.com/delowododavilokiriwukexiwv2h.pdf
    • http://lumufurisazela.mywebcommunity.org/adding_text_to_free.pdf
    • http://shmelev.pro/karibufuligujqyea.pdf
    • http://sabumow.mygamesonline.org/lasko_digital_ceramic_tower_heater_walmart.pdf
    • http://pasetbs.xyz/are_my_feelings_realhpvbp.pdf
    • http://dalifajebuxog.scienceontheweb.net/16922249934.pdf
    • http://alternativeinfluencenetwork.net/89585935070lg0ac.pdf
    • http://rankingcoach-seo.com/61737607699a3p0f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_c5857d2d2d2e45e3ac97933e2dd2f5d2.pdf?index=true
    • http://lukafimagog.atwebpages.com/it_book_chapter_3_summary.pdf
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_175b0e6db77241618f06972843ae0837.pdf?index=true
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_0b94e99f503644979657c647ec5b6af8.pdf?index=true
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_239b8186a99b4b9d929a297c7ac174ed.pdf?index=true
    • http://sokekakeloji.onlinewebshop.net/wosudepixelewep.pdf
    • https://uploads.strikinglycdn.com/files/609bc825-d809-4bcb-a4c3-4509e8d6861e/how_to_get_gerudo_secret_club_password.pdf
    • http://bupalim.atwebpages.com/abstract_test.pdf
    • http://pesetunal.onlinewebshop.net/28769814041.pdf
    • http://wudemexa.myartsonline.com/15208995869.pdf
    • https://uploads.strikinglycdn.com/files/62953d43-3827-47f9-83d1-df8cfa6b9918/golden_song_thailand_season_3.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e94a.bin
6e8a30fc0de2a6a5b1ab1c213b078188bfc28d25d972603e3163cadc3628b633		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE94A 5400 bytes
font_01_sfnt_off0000fb95.bin
64f20ab08ad4ccb658041ff2251c4e4bce4a19c4b23f9bb68679c3bf5bacde72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB95 11072 bytes

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