Malicious PDF — malware analysis report

Static analysis result for SHA-256 8617131442afb3cf…

MALICIOUS

PDF

69.4 KB Created: 2021-03-31 01:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6272ae194fe6575878e60a91e14ea21c SHA-1: 7ff7291db86928f6cfa0a7fc07d7981a67e8f456 SHA-256: 8617131442afb3cfd79e1cbc663b3cf7f6f8c6da0b7011ec16dbde80028b59a8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/award?keyword=kefalonia+road+map+pdf'. This URL is the primary indicator of malicious intent, suggesting the document is designed to redirect users to a harmful site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=kefalonia+road+map+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489045/normal_6035e0ee5b334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461481/normal_6022a6d9e7e80.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/38heFgc/95891498345.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423189/normal_60048ceb5620a.pdfIn PDF document text
    • https://cdn.sqhk.co/lemijexo/ihhfjgt/game_of_thrones_swords_names_and_owners.pdfIn PDF document text
    • http://dogusiwimukames.iblogger.org/41639204784.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455669/normal_60009e6f16383.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/cfWjeW1/tidobivemosor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_5fdb03d5c86c0.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/53bdd2d9-8b84-46c8-8f02-e71e4b73530b/xilusesamemigaduxutovek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b2c5464-de4d-4801-9d41-95d4b5e28a0e/54300764947.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/11603512823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/957dd07c-f0b6-4281-8d7f-1fafa9e4af17/how_can_i_learn_physics_by_myself.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51828d35-5012-4f45-913a-03722eb0738f/how_to_design_a_quantitative_research_question.pdfIn PDF document text
    • http://xuwewajefifa.rf.gd/how_to_take_prius_out_of_maintenance_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/kabajiwododowasitod.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/book_review_of_ponniyin_selvan_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e7a036-a2fb-4683-802a-0bc232630a93/winchester_gun_safe_lock_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd1fcad7-1cd1-43dc-815f-a5eba082bf94/91212750998.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/ver_yo_amo_a_juan_querendon_capitulos_completos_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/798666bb-c473-4a8b-b2da-57561e215db2/what_the_book_after_the_last_olympian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90be126e-2cc8-4f1f-84ce-a9fbc6e0db69/pogewanexiluxadoludexoli.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_off0000d2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F7 4976 bytes
SHA-256: b9082a4adde0a11fccea5dd46c90cc42c33a62c06c54a80bff974e1112ca265b
font_01_sfnt_off0000e3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D5 10756 bytes
SHA-256: 92c6c408fadbbc9c0cb119499d7ae101283b71a7de3b62e68784cd189627860c

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