Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24dcd1218582795…

MALICIOUS

PDF

83.3 KB Created: 2021-03-07 18:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1b13b464bc3264c73b52e7b1984e86f7 SHA-1: 38126ceea1af0f139a9d1cbb57dc3d0799a8d9bc SHA-256: b24dcd12185827955ec19a2c52cc9c47e33c4a7020a518a2e19ecbd1c484a32e
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/award?keyword=how+to+organize+pokemon+boxes+sword PDF link annotation
    • http://ital-tess.space/77538497111fny24.pdfIn PDF document text
    • http://trujillostacoshop.com/average_starting_salaries_for_engineersh10kp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454971/normal_603e4ff92ff72.pdfIn PDF document text
    • https://cdn.sqhk.co/luwagoma/Ml4jbzG/ted_baker_glasses_manufacturer.pdfIn PDF document text
    • http://theharaka.online/756146472045bma4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506063/normal_603b28ff0c1dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502178/normal_603c25193cf65.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/jijggqv/cats_crash_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/hdhiCie/baixar_fur_guardians.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391317/normal_5ffd3732b31c1.pdfIn PDF document text
    • http://vvinorama.website/90912532218u6fum.pdfIn PDF document text
    • http://cooldomen.space/factorio_all_science_blueprint8gmfp.pdfIn PDF document text
    • http://my-favshopc.online/zubegb9n5u.pdfIn PDF document text
    • https://bonuwokepav.weebly.com/uploads/1/3/4/5/134592975/tuleraxixomi-romefes.pdfIn PDF document text
    • http://creamwalls.online/sling_tv_blue_packages_2019wuilb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417426/normal_60207de9ca595.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzikewed/RgdiLhi/64219272230.pdfIn PDF document text
    • https://fitezaxuju.weebly.com/uploads/1/3/4/7/134724711/xukafeneje_lomogadasorof_leniwugemuxilop.pdfIn PDF document text
    • http://runmasten.online/war_bollywood_movie_2019_free5nx3x.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
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_6842f17e6ec84b738c7218f5f268a145.pdf?index=trueIn PDF document text
    • https://7f1888b6-cdab-4603-9914-1cf81a8b29aa.filesusr.com/ugd/6846fe_19328315a9bb4b09b93eace72909f313.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC77 5412 bytes
SHA-256: c243bbffb44c5df56272636b9fc8f4895c2643a27736a57886e8ddb4dfe77272
font_01_sfnt_off00010ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED2 10212 bytes
SHA-256: ce449337e972d90a5274003ff62a2aead6739dfb86e0afa4a9e9b3245928ad00
font_02_sfnt_off000131e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E7 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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