Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e6e401ecdbfced…

MALICIOUS

PDF

69.3 KB Created: 2021-03-13 21:14:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 00bf93bf2ebbe47a6f0d635db1379146 SHA-1: 48f5df96116f5c65e1bf41cc7be8f52213535ed3 SHA-256: d5e6e401ecdbfcedef549047a6b40319a7bfa7eb64b860ec1008ada5b31363a8
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs and the heuristic findings of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM point to a campaign that uses SEO-luring tactics to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/wb?keyword=principios%20de%20economia%20mankiw%205ta%20edicion%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388427/normal_601131cde2318.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/phonological_processes_chart_by_agez4rwb.pdfIn PDF document text
    • http://air-calm2.club/splash_screen_android_library9yzlc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388629/normal_6029f2cf2c6a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_603443bbc7d8c.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/diablo_3_fastest_demon_hunter_buildxf22t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475375/normal_601fccbac10b7.pdfIn PDF document text
    • http://wbigs.space/catan_2_player_rulesqke96.pdfIn PDF document text
    • http://konsalting.info/how_to_start_a_honda_em5000sx_generatorjmx7u.pdfIn PDF document text
    • http://prostotit.site/25_verbos_en_ingles_y_espaol_regulares1ll1n.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/300749623613x87q.pdfIn PDF document text
    • http://detonic-buy.website/sprinter_gear_stick_stiffhamd8.pdfIn PDF document text
    • http://helpcopyright-service.com/602349895339f1wx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7031c68c-cf47-488c-b9bd-b344696616f5.filesusr.com/ugd/51e9e9_c9c96b05da174e818897f2f527fcee69.pdf?index=trueIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_f5042435c4a142c38318b64bf1347143.pdf?index=trueIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_ae28c8c418204c84a57db52f2f367d12.pdf?index=trueIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_5a1f58a6d6254f0bb324be012d80e3f0.pdf?index=trueIn PDF document text
    • https://9610c43f-1b2a-4a8a-b660-75aaf3908198.filesusr.com/ugd/286fb8_90e0e528049b4a949f644c0b4cc0ef30.pdf?index=trueIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_94766e86861042aea25d04edbfe363b9.pdf?index=trueIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_3ce5a0d2f0ca4b978378d55bd5ebf078.pdf?index=trueIn PDF document text
    • https://4c69d07c-928c-405f-a1ab-6436392658c4.filesusr.com/ugd/4c264d_5871f7f3d9b544ecb4b7ce62d0fa5582.pdf?index=trueIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_012aa40a0f564c26a317a95dbe30c19d.pdf?index=trueIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_d109aec230824265b75b1d354f8de921.pdf?index=trueIn PDF document text
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_2c5cd1d82d184eae8f1c4fda9a30b92d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEB 5548 bytes
SHA-256: d266d768491f3d88303af409fb7ef071ac66591be15dcde32a9f63d28fe78e81
font_01_sfnt_off0000e0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CA 11404 bytes
SHA-256: c8b6c9ff1801322599694717d653044beb8e65306c899606e51558c214ac5de6

Open this report in the interactive analyzer, or submit your own file for analysis.