Malicious PDF — malware analysis report

Static analysis result for SHA-256 884c2ddeccda5d06…

MALICIOUS

PDF

80.0 KB Created: 2021-06-06 09:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9ec871b92cef71c685437df0735a8e53 SHA-1: e3a83f294ad6e34f49dbceafa4646f7c8e8e6218 SHA-256: 884c2ddeccda5d06a7182ac2d042935b057674bb04030f9baead5b2b712a745a
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://chcial.ru/pbw?utm_term=the+easy+way+%2528easy+way%2529+to+stop+smoking+-+allen+carr', which is likely used for phishing or to download a secondary payload. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://chcial.ru/pbw?utm_term=the+easy+way+%2528easy+way%2529+to+stop+smoking+-+allen+carr PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480732/normal_601385da52b0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_602f6a8e2cd74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pinurakus.pbworks.com/f/blockman_go_cheats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b8c5b8-fad8-41f5-b8e2-e7e0b4fc001b/garmin_drivesmart_55_ex_with_traffic_manual.pdfIn PDF document text
    • http://degenazi.pbworks.com/w/file/fetch/144469437/sri_suktam_odia_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6fa9fb2-30d8-441f-88dd-bb3206c818bf/not_your_sidekick_common_sense_media.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/f/how_to_get_mods_on_minecraft_education_edition_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad4b5c0-c323-469a-ac91-5281f48ec967/corey_wayne_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bcf20dc-53cc-4e04-ba6d-80ac574ef68a/66763154411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9919802b-599a-4c85-9026-d7a1287daefd/tesla_model_3_for_sale_new.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa0f7987-e100-4acc-9fe8-ac2a2d83753f/68769395794.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/399103363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d987ac0-f07d-4ecd-8eb5-3bda239e1b9d/rudivizomitixap.pdfIn PDF document text
    • http://fixiguru.pbworks.com/f/boledenexalovosubasufut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0993cd61-95a5-4fed-ae04-ac409d800876/how_to_fix_putting_gas_in_a_diesel_engine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f7f9243-cd4b-4e2d-a420-9d0fb3bceffa/96627095975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4f924e8-3486-41d5-b4ea-3e77757d47b2/65101050092.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_off0000f97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97A 5740 bytes
SHA-256: c9cf4b15a49515ed6c8b94a84535f7977ffa5e10b529daedc4b8900e229ddcdc
font_01_sfnt_off00010d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0E 10916 bytes
SHA-256: 3cafc81de13eb47a7899e54742e0d2148d9ff5c7ce37891799284faadbd855fc

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