Malicious PDF — malware analysis report

Static analysis result for SHA-256 84060036086d6d7c…

MALICIOUS

PDF

80.7 KB Created: 2021-03-08 10:33:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c71c7d1b6d33fe486d37e96f5ddc29d1 SHA-1: 8fdfc2f5ac4fbf3002efb2313cd126018ffdabd3 SHA-256: 84060036086d6d7c82248ac7b6e14ba1cfc23f3a1934619d9ba84b540b9b1780
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including a ML classifier and ClamAV. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links on disposable hosting, further supporting a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/wix?keyword=hindi+birthday+wishes+for+daughter PDF link annotation
    • https://dataremidesop.weebly.com/uploads/1/3/4/6/134697992/begune.pdfIn PDF document text
    • http://fibaxoxadomi.sportsontheweb.net/honda_eu2000_parts_list.pdfIn PDF document text
    • http://rajelakitapeki.iblogger.org/50583095587.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/princeton_offense_playbook.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/gupefutujezizuzidaruwapa.pdfIn PDF document text
    • http://sberhome.ru/how_do_you_start_a_bosch_dishwashervefpj.pdfIn PDF document text
    • http://qunit.space/89601285534h8ay9.pdfIn PDF document text
    • http://dimupure.22web.org/31396399369.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/xamimaru.pdfIn PDF document text
    • http://pek-24.cc/95988115810vk1jo.pdfIn PDF document text
    • https://musagitunoton.weebly.com/uploads/1/3/4/3/134368320/fumagalidazip.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/how_much_to_rebuild_a_302.pdfIn PDF document text
    • http://fbcopyright-center.com/maytag_bravos_xl_washer_mvwb835dw3f8cqv.pdfIn PDF document text
    • http://vixegoxufareka.getenjoyment.net/ps3_emulator_pc_metal_gear_solid_4.pdfIn PDF document text
    • http://sfr-webmail.com/mugolukoduvuxufenizu2akq5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7b89a01-7f8e-4b79-8312-416684f6bf63/how_to_improve_editing_and_proofreading_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37407157-db90-49f9-a9c2-04ee862ad91b/65195539289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9caadb0b-fff0-4d46-bccb-dd6e90614de0/99311089687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3dbb7f4-de77-478b-97f1-3fd9b9096926/39084190871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/507c2fe2-db15-43cc-b746-cf751315e9ba/how_to_fill_transmission_fluid_honda_odyssey.pdfIn PDF document text
    • http://fedubumisuvek.epizy.com/49127019351.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE543 5432 bytes
SHA-256: 82f0eb14a914d9b0c231f04d9d653a6ecf059ece026ddc1d5d7259ab3f67e00d
font_01_sfnt_off0000f7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CC 9768 bytes
SHA-256: 2c0a56c43023386d26f825d86bd6fcac576428a8aafcd9c1013b7553742cb22d
font_02_sfnt_off00011975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11975 8544 bytes
SHA-256: d7f4172bc49241afed40e84467f958dae42b5771a13de80c330a8ffe3a3f3563

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