Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd081f2613ee8dde…

MALICIOUS

PDF

76.1 KB Created: 2021-04-05 16:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1131d8d549a57699cb416d6965ab2e63 SHA-1: 7c17d31e1a62f6cc595bc94320984ffb186c55f2 SHA-256: fd081f2613ee8ddefefd08ec57ad8d0529faa620f9e7124ac456fb7df80f687d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature, classifying it as a phishing or trojan PDF. The embedded URLs suggest an attempt to redirect users to phishing sites for credential theft or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=what+is+a+people%2527s+choice+award
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/jizukigefimixa-bimokogirojonu-fagul-soxejewurop.pdf
    • https://cdn.sqhk.co/xufaribo/Eaghgh4/40_year_old_virgin_unrated_parents_guide.pdf
    • https://cdn.sqhk.co/figesuweno/lpEtjgC/20863646877.pdf
    • https://cdn.sqhk.co/rivitovolu/ichiNie/rainbow_boa_snake_for_sale_uk.pdf
    • https://cdn.sqhk.co/xaxovowupofa/VyuPCS4/50115440207.pdf
    • https://lafitezin.weebly.com/uploads/1/3/5/3/135323108/5be19.pdf
    • https://cdn.sqhk.co/xibetevoxaj/k9gdjaO/kuxutesotopex.pdf
    • https://cdn.sqhk.co/xemuxebu/ehg2hbA/the_card_apprentice_novel_full.pdf
    • https://xalekosud.weebly.com/uploads/1/3/5/3/135350534/520454.pdf
    • https://roxamemimo.weebly.com/uploads/1/3/4/5/134589570/jefaxuzekipix.pdf
    • https://cdn.sqhk.co/lilomovetum/gjuqA4T/2012600937.pdf
    • https://cdn.sqhk.co/pipujevi/vjaieWf/top_up_my_three_sim_card.pdf
    • https://cdn.sqhk.co/nexoratuxi/TIjgQmg/najoxosiwidakezogetojofuf.pdf
    • https://cdn.sqhk.co/wejawujagi/osF3lrB/65549051994.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pusolefosex/changelog_app_for_android.pdf
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_4d4b9a8d933148d5bfb2da144bde810d.pdf?index=true
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_8d7c27913daa49828b53a0f3371a7701.pdf?index=true
    • https://s3.amazonaws.com/dopugaxelelema/different_ages_of_english_literature.pdf
    • https://777dd155-384c-4f1d-a337-8f27b94bb056.filesusr.com/ugd/1ecdae_48c4dc5dcfce433aa728028b2ea680bb.pdf?index=true
    • https://s3.amazonaws.com/luramamelolem/imagen_de_carita_feliz_animada.pdf
    • https://s3.amazonaws.com/nimuwet/jrcalc_guidelines_2019.pdf
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_c844881f5df64a5f804f2b8a217c9e1b.pdf?index=true
    • https://s3.amazonaws.com/jajuzasalikirut/how_to_draw_cross_section_in_autocad.pdf
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_83687b8d769e40bbb5905a2a839e2955.pdf?index=true
    • 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_off0000eae7.bin
83d90808a6e268d0dda180c15f4a98ec0c77e670e13ba7bbd5a0d75520a565e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE7 5300 bytes
font_01_sfnt_off0000fd03.bin
cd32aaa548246e994875b91061f6b268c0f9f233db0455dc96c52b45070fdcb5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD03 11324 bytes