Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e5bc5861c2e755…

MALICIOUS

PDF

208.8 KB Created: 2021-03-20 12:03:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fa3372f8fd128c3fe87e54805fb4e223 SHA-1: 61d0b2875913c66c14a1e531737d40793c440ad5 SHA-256: f3e5bc5861c2e755d37484ef8065cb62ebdab4318ff7b1d84cb288f173a6f314
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL disguised as academic notes. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The primary IOC is the external URI pointing to a suspicious domain, which is likely used to host or redirect to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/award?keyword=business+law+notes+for+b.+com+pdf PDF link annotation
    • https://fuvapevamasazu.weebly.com/uploads/1/3/4/5/134507747/9385014.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420588/normal_600273f39b0a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424689/normal_5fe4f365648f4.pdfIn PDF document text
    • https://joxufomuvonabu.weebly.com/uploads/1/3/4/4/134474754/beporozo.pdfIn PDF document text
    • https://bumipavadawafez.weebly.com/uploads/1/3/2/7/132710759/4a223c4a82450d.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/qx1gdgh/fixoridujudafagifa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369324/normal_5fcaa494cabfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466680/normal_602b238d57496.pdfIn PDF document text
    • http://dixojele.22web.org/74971458234.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/ijbPhcI/instagram_captions_for_mirror_selfies_with_friends.pdfIn PDF document text
    • https://radisowe.weebly.com/uploads/1/3/4/3/134366404/lujexus.pdfIn PDF document text
    • http://kugamuwefula.iblogger.org/wearever_super_shooter_cookie_press_replacement_parts.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_61d605ed9cb24134b7d2a5f48d5b2e93.pdf?index=trueIn PDF document text
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_e6292e4066af42acba535347690d354e.pdf?index=trueIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_cb050dcaccd449f8ba38d31b2336862d.pdf?index=trueIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_3334adf69dc84423afce0f7172451016.pdf?index=trueIn PDF document text
    • http://doroxokile.epizy.com/impossible_quiz_q_23_answer.pdfIn PDF document text
    • https://1df32be7-5e6a-491e-80e4-5c558052ef26.filesusr.com/ugd/e02e08_ee3456a01be944c7a625aad1c5f057a4.pdf?index=trueIn PDF document text
    • http://vedebimefawimad.rf.gd/how_to_reply_thank_you_email_from_boss.pdfIn PDF document text
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_6f19fd6aa6e2442d995ac19287ef1ffe.pdf?index=trueIn PDF document text
    • http://gorefoverotiw.epizy.com/18831186590.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_off0002fad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAD8 5616 bytes
SHA-256: 196c05436a01a56347f650f15efdcdb6a87c6af070705b0714b4328620dad77b
font_01_sfnt_off00030df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DF3 11040 bytes
SHA-256: e77d44935aef120dc54e16bc841377cc8eb34d02df3367a55512d18fdd3251cc

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