Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92b11a20a77776e…

MALICIOUS

PDF

79.0 KB Created: 2021-03-12 07:17:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d08bffb569828558561662cbfcb56dea SHA-1: 4f3e8c16f441e54f689ce6373e094b89c1bcb224 SHA-256: e92b11a20a77776eff8fa07fb9aa720771cd95fcd28946ea0ecfeb47afe2a1eb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful sites.

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 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.
  • 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://druttle.ru/award?keyword=advertising+appeals+pdf PDF link annotation
    • http://bimoriz.getenjoyment.net/the_gym_teacher_from_the_black_lagoon_reading_level.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/altered_carbon_season_1_episode_10_reddit.pdfIn PDF document text
    • http://dipunag.getenjoyment.net/95803958273.pdfIn PDF document text
    • https://janepaxe.weebly.com/uploads/1/3/4/0/134097288/rakama.pdfIn PDF document text
    • https://notomufibaka.weebly.com/uploads/1/3/2/7/132740278/eb2f56c.pdfIn PDF document text
    • https://lojexidipiwakif.weebly.com/uploads/1/3/4/0/134041559/samakufad.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/how_to_release_psoas_with_foam_roller.pdfIn PDF document text
    • https://mafexanilexa.weebly.com/uploads/1/3/0/7/130739060/ca5546b774cf.pdfIn PDF document text
    • https://faxegosesu.weebly.com/uploads/1/3/4/5/134528451/bakabub.pdfIn PDF document text
    • http://lorozetuwivu.medianewsonline.com/rt_n66u_router_mode.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/lupebesu/silazowonarokaxenusaxuboj.pdfIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_31c8e64904f64b1fb7d51dfe9b10bb9d.pdf?index=trueIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_a784a2f4a1804b15b93d7382f609c3e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/vofamazo.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/countryside_code_rules_activity_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/bizizuwudakudelikar.pdfIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_62c26c29ce7641339c08e6d835dac3c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/rajkot_gazette_online_form.pdfIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_0a8c01594ca844248576a9eaa470f1d2.pdf?index=trueIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_2a456a31a4764c6481a318fe4bad0a8a.pdf?index=trueIn PDF document text
    • https://b615eccc-4413-4b1d-8109-ede925130a83.filesusr.com/ugd/0994f9_cfd46464d4fe4656a8f1cdc7713680e5.pdf?index=trueIn PDF document text
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_ac25fb94359b49bf9a8c3bc8c2f1bf2f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/jeevitha_chakram_telugu_movie_songs.pdfIn PDF document text
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_004372c7f7a0463584eb313513cf2143.pdf?index=trueIn PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_506689dc4eb543b78c279567600f910e.pdf?index=trueIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_44490d4edaf4440ba0bd990b6a543df4.pdf?index=trueIn 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_off0000f6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C4 5256 bytes
SHA-256: d476927e6040ee708c7f11b8413b3611e3229c07463c38146ad4a8ac9fdf996d
font_01_sfnt_off000108c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C1 11040 bytes
SHA-256: fe0dd428ce81b811ee16289de3b65626d429efe0dfea9b3e07d6d8f6d7e072d2