Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ff02d43909793d…

MALICIOUS

PDF

69.6 KB Created: 2021-04-03 10:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5ce2d8d97c19120207cbf9916c268b04 SHA-1: fa2cc221879a2d7788682fd11d221c093069cb7b SHA-256: a8ff02d43909793d980398fed77715e776cd989995fc6bd12af349caca9d8ac7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://yafferge.ru/award?keyword=elbe+cardan+shaft+catalog+pdf'. This URL is presented within the document's content, suggesting a phishing or malware delivery attempt. The ML classifier and ClamAV detection further support the malicious nature of this PDF, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/award?keyword=elbe+cardan+shaft+catalog+pdf In PDF document text
    • https://cdn.sqhk.co/ravusigi/4jhgdja/d-_day_invasion_beaches.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/jijgLgg/65099576805.pdfIn PDF document text
    • https://cdn.sqhk.co/kipebakebe/MhcOiiZ/best_home_camera_security_system_consumer_reports.pdfIn PDF document text
    • https://cdn.sqhk.co/sisagoku/dxogcib/23694288289.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/bjijcSM/flipkart_careers_email_id.pdfIn PDF document text
    • http://zurufarovosu.iblogger.org/xogilimi.pdfIn PDF document text
    • http://zuragaretezi.iblogger.org/excel_copy_conditional_formatting_to_another_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/dojaxeje/djayShe/the_farm_horror_movie_wikipedia.pdfIn PDF document text
    • https://cdn.sqhk.co/raxasumo/ggggdgg/xeruxabiruzitidaxapakijer.pdfIn PDF document text
    • https://cdn.sqhk.co/tenalewi/vhDhaxo/hubelino_marble_run_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/Njaiaid/mirtazapine_for_dogs_side_effects.pdfIn PDF document text
    • https://cdn.sqhk.co/dedesonor/XYMhbcX/27618856436.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae93ca6d-870f-496c-b9cd-9bf2a503aeeb/red_mini_dachshund_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c25ecf63-3145-4ec0-b562-d72eddbaad1f/adt_dsc_panel_beeping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcfc243e-b043-4e16-9f0f-3d4f6827eda9/what_colour_is_your_parachute_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2dfddb8-9d42-4406-a954-610efef4cae2/vokekakokazagirosagari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/802028a5-08c9-4eb6-96a3-135fcf9df864/dunkin_donuts_carbs_in_munchkins.pdfIn PDF document text
    • http://todamabofadufod.epizy.com/97327307918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a9e775-0a06-4a2e-bba4-7dff33f04bfd/7238241433.pdfIn PDF document text
    • http://zoletafexogixa.epizy.com/what_is_addie_model_in_social_science_studies_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b5b3ac-4bf4-4eae-9846-49e7bdc0eca2/retanexopalimum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7539e74a-2fc2-4835-ac58-2473e8ab94e1/minidalosenativonid.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35F 5512 bytes
SHA-256: a5aca79ce80d5cb6680b8a291db502170b35b29f3f6b041e69043b92a8c3eaec
font_01_sfnt_off0000e618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE618 10376 bytes
SHA-256: eab52241820753d6f0521d8adf992ed0f1d51d63720ee17923da5ea7e0d0ed9c

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