Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaafd8e0792eed36…

MALICIOUS

PDF

64.2 KB Created: 2021-02-14 15:32:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f9990e4712b9689b8f714d5d4e8aacc7 SHA-1: 204d354a458e1c3d01b1639c14f3f58b35729a81 SHA-256: eaafd8e0792eed36bda0e38f0fffd4927753e09a5fd511db29d84bb4c2bb55fe
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing infrastructure. The document body, though heavily obfuscated, appears to be a lure related to educational materials, likely to trick users into clicking malicious links.

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://bologen.ru/wix?keyword=big+ideas+math+orange+answer+key+grade+6 PDF link annotation
    • http://remont-kholodilnikov.website/9049896849iognx.pdfIn PDF document text
    • http://hookup755.fun/20827043522ohk0f.pdfIn PDF document text
    • http://save50.pro/pumovufevopinirakibarw3grw.pdfIn PDF document text
    • http://nojagemegoxeda.22web.org/97358986972.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/iaqjidu/xylophone_ringtone_vine.pdfIn PDF document text
    • http://yourbigdick.space/avatar_full_movie_free_720plam25.pdfIn PDF document text
    • http://vostokzapad.su/kenolusdd49s.pdfIn PDF document text
    • https://cdn.sqhk.co/pibigovaxavu/jdSifBp/cod_loin_recipes_baked.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/icP120T/ark_survival_evolved_beginner_guide_2020.pdfIn PDF document text
    • http://twirlini.com/boule_de_suif_italianoon0uw.pdfIn PDF document text
    • http://tiburozikibuvex.22web.org/97428349316.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/e6h6HRy/short_moral_stories_in_english_for_adults.pdfIn PDF document text
    • https://cdn.sqhk.co/somisafeg/gdgfieu/restaurant_story_mastering_recipes.pdfIn PDF document text
    • http://xxlmature.site/average_and_instantaneous_velocity_worksheet_answersnq73k.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/vuterijoze/localizar_mi_celular_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/secretarial_audit_report_of_infosys.pdfIn PDF document text
    • http://dubabin.rf.gd/ledutibebesal.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/baby_status_malayalam.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_off0000c027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC027 5668 bytes
SHA-256: 4dc07895dd72823f6da82a4560aa7dde909df8ac07a150762b0c869afda43677
font_01_sfnt_off0000d362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD362 9524 bytes
SHA-256: 6396ec61818dbe995f06287a78c6ae31a62c54b3c3604ffed7209a1e421600ac

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