Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb00c70d8c0364df…

MALICIOUS

PDF

68.8 KB Created: 2021-04-21 13:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e05b6f79a0a040672cddc9c8d98af326 SHA-1: bd0ecdc4ad229f3a993dca9b5818c58d0b36f8db SHA-256: eb00c70d8c0364df50be4cc74469546cecada10ab8c84dbbfa06475a0e437c69
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to direct users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure itself facilitates the embedding of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/strik?utm_term=how+to+use+playtex+diaper+genie+complete
    • http://xalesawena.iblogger.org/nigeria_edo_names_and_meanings.pdf
    • http://reduslim-italiaoficial.site/63526817247cdwb9.pdf
    • http://puliliraforuwu.22web.org/fatal_frame_ps2_guide.pdf
    • http://micrometerdigital.xyz/31519444518w65hn.pdf
    • http://electorat.org/35970980715hgotd.pdf
    • http://murezisafedamaw.22web.org/free_audacity_with_crack.pdf
    • http://swiss-gear-top.xyz/how_to_mix_rb_vocals_logicrzz23.pdf
    • http://mishabelle.ru/wegekup96v21.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://puxakuxuvon.epizy.com/52590886605.pdf
    • https://uploads.strikinglycdn.com/files/976319d5-6b9b-4be7-b62c-ae8c9f2f251b/zujepufedatitu.pdf
    • http://jegepifewomu.epizy.com/junebug_movie_parents_guide.pdf
    • https://uploads.strikinglycdn.com/files/aba5ca0b-fc08-4e45-abfd-b0fcb3a33210/what_does_god_think_about_adultery.pdf
    • https://uploads.strikinglycdn.com/files/db9d48d7-373c-4a2e-8fb2-f4887a6a8344/elementary_number_theory_david_m_burton_free_download.pdf
    • http://sokexodine.rf.gd/pewesukibekeveridefen.pdf
    • https://0d801636-e20c-47cf-9654-f2c4f0d28fb9.filesusr.com/ugd/2e7c9c_48192bb48ecf488484002472f55ca058.pdf?index=true
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_dbeeafc3b468407486119c87130e750f.pdf?index=true
    • http://vixezazemezox.epizy.com/aashiqui_2_tamil_song_video.pdf
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_354e918e4ba5470fbebcfac274c6276b.pdf?index=true
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_6f8c6efdf3074c4995066c8c9560195f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cfb3d972-6d4e-4109-8d2c-07ac79550019/4847666469.pdf
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_f454c931c3dd4fa8a7e862b0d74bbb1b.pdf?index=true
    • http://luwulifinuneti.epizy.com/5610419777.pdf
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_af1ffbb1cf5e4cd0aefe799184977b2d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3d06efa4-a296-48be-8004-c8ec5931820f/tower_of_nero_characters.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_off0000cfad.bin
5750fb65c6f6ea8db4064efb7f622425d7ba7267aa6dc772023d677a395bbba9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAD 5616 bytes
font_01_sfnt_off0000e2d8.bin
88ea0f2990f8aa85a88f5fc87b578ed15a7080e7a7325ad8fef3dc4c3c7d102b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D8 10208 bytes

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