Malicious PDF — malware analysis report

Static analysis result for SHA-256 68025631ab376d20…

MALICIOUS

PDF

112.5 KB Created: 2021-04-02 15:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: bb85e0d423d5cd9d1bb6ef7950f3f576 SHA-1: b3384f7b10b3c137f47a0ee95dfd43bc9395ee68 SHA-256: 68025631ab376d2077980886073a24dd40af9b2faa3bf885d7b4a01b7d2da4a0
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a primary URL pointing to a site that appears to be a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 5

  • 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 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://ponafet.ru/wix?keyword=system+of+linear+equations+word+problems+worksheet+doc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371261/normal_5ffece5ce7e0e.pdfIn PDF document text
    • https://cdn.sqhk.co/dejijadu/joKFRHH/xaferuzajudisifarug.pdfIn PDF document text
    • https://lobogisotu.weebly.com/uploads/1/3/4/8/134870795/fe6824c.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/bgdohjD/history_of_thanksgiving_food_cranberry.pdfIn PDF document text
    • https://cdn.sqhk.co/wosepimi/haMGOCB/etisalat_business_toll_free_number.pdfIn PDF document text
    • http://kirazoki.22web.org/19834947244.pdfIn PDF document text
    • https://rawubewo.weebly.com/uploads/1/3/1/4/131405976/tatobepowumi-zarikibojefowi-kazifiremiv-jexibebedideja.pdfIn PDF document text
    • http://domalitulefu.22web.org/5498631185.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411001/normal_5ff97ecc935be.pdfIn PDF document text
    • https://joxoxego.weebly.com/uploads/1/3/4/6/134664344/4198496.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404107/normal_5ff7756fb1cf5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387816/normal_600484919c74f.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/96391553818.pdfIn PDF document text
    • https://cdn.sqhk.co/movijomo/b6hhijd/sosiwap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383340/normal_600a1462f0d68.pdfIn PDF document text
    • http://kapovulup.mywebcommunity.org/how_to_recognize_each_mbti_type.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/28609417980.pdfIn PDF document text
    • http://punalat.22web.org/kumuvetuviki.pdfIn PDF document text
    • http://nukapag.getenjoyment.net/genetica_humana_libro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • http://piterar.epizy.com/how_to_calculate_hollow_circle_volume.pdfIn PDF document text
    • https://f568b852-d776-40fc-afde-b4c2ef929a3a.filesusr.com/ugd/2d6fb2_8ad1530ade874875851af1988e031556.pdf?index=trueIn PDF document text
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_f03f0c72e5f34a0dac83e95cb39407a3.pdf?index=trueIn PDF document text
    • http://bowukedogatowo.epizy.com/xepesuzetixu.pdfIn PDF document text
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_0ebb1f3d2a684baab792d8ed1c0c8cb3.pdf?index=trueIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_3ee2d4381b1a47ab96218777236bde55.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5C 6020 bytes
SHA-256: 3e5978797dfdb1437231793a8cb9ef14f384602aee1a2a87c30d52d15543192f
font_01_sfnt_off00014fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC8 14808 bytes
SHA-256: 1b9c96a1135e9216e51077a5f9799d8431364aec4e1924d6e04f9a7ca2b89047
font_02_sfnt_off00018256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18256 16688 bytes
SHA-256: 2ad93ed7f3dade91afbf4c832f48a59e85ebd87a98c7da02f620846e8f917b47
font_03_sfnt_off00019992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19992 2376 bytes
SHA-256: b8bbcb072dbd69f9944beb93f070aab1ce0ceebd6da9b42df87516ec40917347
font_04_sfnt_off0001a365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A365 6168 bytes
SHA-256: fd999e1fd5f94f640b59b6bc5d4317866cbd3024b88541b1c9a438720b504531

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