Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6762c1a4b84af0…

MALICIOUS

PDF

77.4 KB Created: 2021-06-10 02:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 20df02b9b31ef99b6318e9ec5703b9ca SHA-1: 3320c154b2f0da3c500eaf140d9710e0a5b4a26a SHA-256: 7f6762c1a4b84af05d00575cdcef8580815c5cf1e2380933b09519e7e6aa63a6
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URI points to a URL that appears to be part of a phishing or scam campaign, disguised as a download link. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://medvor.ru/pbw?utm_term=avro+keyboard+for+pc+free+download PDF link annotation
    • https://rovibabewovel.weebly.com/uploads/1/3/4/8/134884015/72fdfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378607/normal_600aa89788b10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378165/normal_5fef1af53bc86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379602/normal_5fe1128d098b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460677/normal_600d7d0f6ec78.pdfIn PDF document text
    • https://pixofefen.weebly.com/uploads/1/3/7/5/137503885/7046899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472774/normal_605c14910b499.pdfIn PDF document text
    • https://sozatugija.weebly.com/uploads/1/3/4/8/134859818/337463.pdfIn PDF document text
    • https://jawokisejul.weebly.com/uploads/1/3/4/6/134601468/gulobaf-medomupofip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450249/normal_5ff87e8d0d7d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba3d7b76-02aa-454c-8d65-0147916b5f19/what_are_the_different_bandaging_techniques.pdfIn PDF document text
    • http://pubetejidewi.pbworks.com/w/file/fetch/144706659/33924849811.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/w/file/fetch/144456420/does_metformin_cause_tiredness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/275d6ddc-636b-46e1-b7fb-a0f1f5a15ed3/71691928978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39af7708-9e01-4dec-8881-1d82e09e9fd6/what_size_staples_does_my_staple_gun_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53669ee3-8f21-45d8-b903-793bdddb280b/harry_potter_and_the_half_blood_prince_movie_length.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c443bf01-0e6a-4ffe-966b-32190ff9ac59/how_to_take_body_measurements_to_track_weight_loss.pdfIn PDF document text
    • http://joxupakager.pbworks.com/f/english_communication_skills_question_paper.pdfIn PDF document text
    • http://xidesux.pbworks.com/f/73369949638.pdfIn PDF document text
    • http://lakobun.pbworks.com/w/file/fetch/144784173/gakemukekor.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94A 5420 bytes
SHA-256: 0a50ff4bf67a48a6f0eff91659f6d3e5a7bfdbfd295f55f64567eb460b2391f1
font_01_sfnt_off0000ebe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE7 7208 bytes
SHA-256: ca24c930cabbf8fdcb06d68cb63a8469b5fcb16e0c71ee7db1a2065503c8483d
font_02_sfnt_off0001028d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028D 11144 bytes
SHA-256: eb1eabf6185347bc79e046ad61e69dd8722e92a147f109c8153d3bc1eb6e820d

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