Malicious PDF — malware analysis report

Static analysis result for SHA-256 025aaec4f41b443e…

MALICIOUS

PDF

68.3 KB Created: 2021-02-15 16:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1ac8eae90636a6286b9ea5ebda27c680 SHA-1: a6011d5c93e7e357726c33d22ae28163dc918b13 SHA-256: 025aaec4f41b443e60385900df352cafa3e435c9fe74ee93f644d80a2d0a9680
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=ancient%20hebrew%20torah%20by%20jeff%20benner In PDF document text
    • https://lopenedaxi.weebly.com/uploads/1/3/1/6/131606218/839767d3342f.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/Dw0Cqje/wakuzepaboguko.pdfIn PDF document text
    • https://cdn.sqhk.co/selugijibix/midOgjT/99536162187.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/Fz2Tbhb/waze_apple_watch_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/sWtJhib/age_of_city_tour_2048_merger.pdfIn PDF document text
    • https://xuvaguwofivopi.weebly.com/uploads/1/3/4/4/134463587/runawejepoluj.pdfIn PDF document text
    • http://tukazijib.22web.org/24796126579.pdfIn PDF document text
    • https://gasibexagitusin.weebly.com/uploads/1/3/1/4/131408117/napitupedax_tokeronekugutu_futavemax.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/KjihiUp/59381954002.pdfIn PDF document text
    • http://pilefubasusuz.iblogger.org/wamedez.pdfIn PDF document text
    • https://sajozigita.weebly.com/uploads/1/3/0/8/130814351/doturuwodevipuvolada.pdfIn PDF document text
    • https://xeneniwavufew.weebly.com/uploads/1/3/2/8/132814439/vuzisubode.pdfIn PDF document text
    • https://cdn.sqhk.co/gipudeviwapi/hjhihh6/secret_video_recorder_android_app_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mukaxasapezaw.rf.gd/juligamafutesebimovedolel.pdfIn PDF document text
    • http://bamalupit.rf.gd/cold_war_superpowers_key_terms_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/68620541470.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/excel_index_match_other_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/86726393423.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_off0000cf81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF81 5156 bytes
SHA-256: 4ec15e3cd9c575aab06e871ba8e4ec35205afc08bd54488b2f80ce70351da7d7
font_01_sfnt_off0000e129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE129 10244 bytes
SHA-256: d4cfda90f5285f83e4f5c407e06e040429aa55173c383cba94f7f81518377114

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