Malicious PDF — malware analysis report

Static analysis result for SHA-256 579ecdb4e0095f77…

MALICIOUS

PDF

82.3 KB Created: 2021-05-18 18:35:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 223be3f9db2585b5be58bf32b7b54e02 SHA-1: c55ab24327c3b52464c7435b7d4c3bb5a65154c0 SHA-256: 579ecdb4e0095f77b52f6f20f8e4a2f6308d82aa18930aaa50eec12fddfbb721
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://jacksth.ru/strik?utm_term=funny+riddles+with+the+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413714/normal_5fe1bc63124d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407804/normal_60391a1254a38.pdfIn PDF document text
    • http://tosasex.22web.org/harry_potter_book_set_hardcover_used.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vososasoxumete/maul_son_of_dathomir_comics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab487983-013c-4bd0-8f2a-71eb6ad7f2ea/tuskegee_university_event_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8edd6b47-d39a-43f2-b2f8-6af8e0372c51/unearthed_arcana_magic_items_of_eberron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dece311d-7359-44e9-bf96-72b138e8cd7b/how_to_write_a_blog_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/566c8f98-f7e1-4977-b0a4-6c19ef52fd33/76135534313.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/quran_word_by_word_urdu_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/where_is_the_drain_pump_filter_on_a_washing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/pakenalu.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/plantronics_headset_manual_c053.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/2013_dinghy_towing_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56140803-459f-4445-8e3a-9c57e269c6a5/jurebifukoduduwisipinixew.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/anno_2205_revolution_mod_v._1._8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73936c0b-88ce-428c-8966-f3896a2aebc5/bully_dog_gt_tuner_diesel_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52247b41-3f1c-4419-8444-0330764cc253/isms_standards_iso_27001.pdfIn PDF document text
    • http://lovopezabima.epizy.com/puwoduw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6bfd51b-676e-4652-8b7f-48329c284f16/93061541037.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/22138855756.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_off0000f7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E4 4836 bytes
SHA-256: 2d4c630f1fbb211793a1bd94a01566e4663cb79db579e3f1168522ab234bc82d
font_01_sfnt_off0001084a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084A 10956 bytes
SHA-256: 930098e96871813634b5a84160cfe92ea112f178a682f0b628b9c8467cdf4ed0
font_02_sfnt_off00012d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D86 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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