Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee65fff195ca3886…

MALICIOUS

PDF

89.5 KB Created: 2021-03-19 16:12:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 90ddf6e340e0fe1899464b4c45a8ec96 SHA-1: 2a411ab3ddc024fbf0b449b323cd2b6493b39bd8 SHA-256: ee65fff195ca3886e9c607f2272215a263f2c8f8de289e4933178436f34bcbe9
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a large number of external links, many pointing to disposable hosting, suggests a link farm designed to redirect users to malicious content or phishing sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/award?keyword=depuy+attune+knee+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463551/normal_6019f0d2265a4.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/JlhaIXl/kufemelanusokovubap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424630/normal_5fda341f1a75a.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/gd2yVjf/rixanowopis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481527/normal_5ff158b72b13b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486751/normal_5fd2771d990ab.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://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_7b7ad0229de0498da7dc0cb29fb117e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecef070b-02ef-47ba-84a4-0872e1d08d5f/simplex_4100_access_code.pdfIn PDF document text
    • https://9e1e9198-0fe7-4103-8084-fdcc6befb8d5.filesusr.com/ugd/2f7815_0e08d69227c342c6af791ff04235eed2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e0c83e4-780e-4803-b875-3bb105e65ad8/tisovixomos.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/carry_on_travel_bags_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/utorrent_movies_app_for_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d12c025-174e-482b-88c7-e720b1f9d889/simbolos_del_diagrama_de_flujo_de_proceso.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/asco_guidelines_her2_fish.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/data_warehouse_interview_questions_for_etl_tester.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/11846860541.pdfIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_943c8cb0154542b8b59843b447e161c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/platform_revolution_by_geoffrey_parker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b60cfa8c-458b-4b86-88c1-e49f31ea211e/japabexavopebobidupikas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50745f23-0a7a-4f0f-8f5b-0725a99b1d6f/samsung_top_loader_washing_machine_cleaning.pdfIn PDF document text
    • https://cdd249b8-77b1-4a94-b024-8995efe4d959.filesusr.com/ugd/d394ff_8857163a3fa944a180978d7f0c093227.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB11 4616 bytes
SHA-256: ba011e9e4a42836718e93b27bdbcfb97c09ba837ffb17d17c4ac17747433cd0b
font_01_sfnt_off00010ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE2 12084 bytes
SHA-256: 248c9d19d80670536f44d42e45080ce1e2006cacf79fed40637e56b3da8bd6cd
font_02_sfnt_off000133ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133AE 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
font_03_sfnt_off000148de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148DE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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