Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4a0656b34dca9f…

MALICIOUS

PDF

71.8 KB Created: 2021-06-09 23:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ef6b260616ebb1164c26a2484cf56a70 SHA-1: 51afa60054524e3dbba6e4922a3a54a168a6a8ce SHA-256: be4a0656b34dca9fab48110a637a7baeffe26061da8fb85d8bfce191bf3bdd99
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'download button' heuristic and an external URI pointing to a download link suggests the document is designed to trick users into downloading a payload. The document body, though heavily obfuscated, contains metadata related to PDF generation and a URL that aligns with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/pbw?utm_term=gaana+music+app+mod+apk+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455195/normal_6004db9f01234.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459916/normal_603b791eaf4ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421966/normal_60b86e6ae1eb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_60bd593fbffa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381546/normal_606cd28e49ce4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482415/normal_60095f50638bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450356/normal_6031caed5cdf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391013/normal_6019b4f8c2153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445338/normal_60684794d906b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_60bc97fa01a0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412181/normal_6002c0ecbaee3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471995/normal_60382abe0b15a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407991/normal_6069e417ccb13.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/1e94ce09-fe65-463f-b7c2-1f9245f7be5e/best_free_hosting_for_wordpress_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eed7adb6-0229-44f9-ac34-75a6c3648301/why_use_descriptive_research_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8530d49-23d6-4e00-bcb1-db19bd8da887/kalunoxutalujunaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/612954c1-be13-498a-b0d4-1a10eca75dc7/how_to_cite_a_book_apa_in_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b6d3aef-5341-4eb2-9d55-a2e223d98bed/are_1st_edition_harry_potter_books_valuable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c79d3f-8ceb-4aaa-a201-c14016a1f1ac/zugoxisivamesutisizos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09aa16a8-738c-42bd-abed-9fca1159e608/22634949744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/697d9040-5a0f-4a4e-9862-bf48b9f4a97f/soundcraft_ui_als_audio_interface.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da0a2cc0-eee7-430c-abf5-6dc40f109648/2012_maserati_granturismo_sport_convertible_2d.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_off0000db54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB54 5308 bytes
SHA-256: 8f126718d432c31949dddf023911346a9cf497aedcf42b3596e682981c5348d0
font_01_sfnt_off0000ed6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 10236 bytes
SHA-256: 2a0292491a6d83d88418b3625c463b8a9275b0bbb13aff2075bfd154e443cded

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