Malicious PDF — malware analysis report

Static analysis result for SHA-256 82cc2400d6715e05…

MALICIOUS

PDF

75.3 KB Created: 2021-06-02 12:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6a660acda798a9fded5379cf892b4fe8 SHA-1: d5cc45fdffcf91336d66f5f7ae20e460ca9f5321 SHA-256: 82cc2400d6715e05fb18c6f3557fe25ad047837e2f7b6b3cc12be2c8b10190ba
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a link farm. It contains numerous external links, many hosted on disposable domains, aiming to redirect users to other PDF files under the guise of free downloads. The primary lure appears to be 'Descargar libro el alquimista pdf gratis', suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://coretry.ru/pbw?utm_term=descargar+libro+el+alquimista+pdf+gratis PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4421462/normal_60b350a0e0c77.pdfIn PDF document text
    • https://geripefuni.weebly.com/uploads/1/3/2/7/132740274/pewati.pdfIn PDF document text
    • https://xapugugividus.weebly.com/uploads/1/3/5/2/135298581/jovozamajex_bizuzimelaler_jobevitotiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366362/normal_5ff9223c4ca71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478414/normal_5fcbd475a478c.pdfIn PDF document text
    • https://mixudepira.weebly.com/uploads/1/3/4/3/134379104/9427237.pdfIn PDF document text
    • https://kozitasulama.weebly.com/uploads/1/3/4/6/134647404/d6be3ea.pdfIn PDF document text
    • https://puwibovur.weebly.com/uploads/1/3/4/6/134639487/9714410.pdfIn PDF document text
    • https://defoxili.weebly.com/uploads/1/3/4/5/134527702/pexaji_jimoteduta_pusomogub_fanukikedoku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144413289/free_printable_grammar_worksheets_for_4th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e218de-fcbf-4b0f-afab-d85c767a1638/how_to_co_teach_on_google_classroom.pdfIn PDF document text
    • http://poforezufovu.pbworks.com/f/cunninghams_encyclopedia_of_magical_herbs_ebay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9198f70-4cd2-4c64-b228-93a07d4d158e/kixivusajelamapejas.pdfIn PDF document text
    • http://sokulus.pbworks.com/w/file/fetch/144479691/garment_costing_sheet_excel_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38878e5a-2673-45be-a732-eb8c421085c3/how_to_charge_citizen_eco_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216d2e5b-ef99-451a-a497-e9381d123d32/how_to_put_image_on_top_of_another_image_in_google_docs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e20dbc7-9e55-425e-9a27-573af0d044ae/can_trx_reach_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb3b137-65d6-4de6-a5c6-d2f6fe5cf71c/87500153449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e979679-fd22-4231-a128-ac7f9c3d877a/lodesoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7dc02ea-1c17-4e26-9808-7ccdd9e8549e/42723051015.pdfIn PDF document text
    • http://zewalar.pbworks.com/f/25431396955.pdfIn PDF document text
    • http://fokojifidesi.pbworks.com/w/file/fetch/144491535/clarke_county_jail_inmate_roster.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD863 5516 bytes
SHA-256: 796e04fa23878108ccc96cea1ef6e409b88fb8c329543112898284eefe7746e5
font_01_sfnt_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 11120 bytes
SHA-256: f8dd843d1d2fc2453a7cd59571e79e8c7e24e8bbb50f56754b95f32386e779ac
font_02_sfnt_off00010f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F89 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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