Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8958f539e816807…

MALICIOUS

PDF

81.4 KB Created: 2021-05-11 23:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 219fe4930785b63589a3787437c2081c SHA-1: 6fb0e5110a057abe92688b4a5abfc7c0e1c6877b SHA-256: d8958f539e816807e94598bf19d30ee6ce6ce5cf48f1e38295284da8f35f0ab0
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. The embedded URL, https://resalured.ru/strik?utm_term=electronic+circuit+design+software, is suspicious and likely leads to a phishing or scam page. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to trick users into visiting a malicious site.

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://resalured.ru/strik?utm_term=electronic+circuit+design+software
    • https://cdn-cms.f-static.net/uploads/4471959/normal_6049adc7bdb07.pdf
    • https://cdn-cms.f-static.net/uploads/4483365/normal_5fd10f2ec46b1.pdf
    • http://sukifomona.iblogger.org/new_blob_data_type_application.pdf
    • https://cdn-cms.f-static.net/uploads/4380692/normal_601b1c05b1d4d.pdf
    • https://cdn-cms.f-static.net/uploads/4478927/normal_603e51e813458.pdf
    • https://cdn-cms.f-static.net/uploads/4368506/normal_606a67b203a74.pdf
    • https://drodil.kapsi.fiWhen
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wujixus/edpb_guidelines_gdpr.pdf
    • https://uploads.strikinglycdn.com/files/f877b8ac-7329-4905-9541-b4975da68863/is_acca_recognised_in_uk.pdf
    • http://tenovelipa.rf.gd/annamalai_university_dde_courses_2020.pdf
    • https://uploads.strikinglycdn.com/files/6396cf1b-0698-4eb6-b3e4-1f596db2569b/educational_leadership_test_questions.pdf
    • https://uploads.strikinglycdn.com/files/a365bb2d-e51b-4837-9d7b-5222ff5935e4/27028470258.pdf
    • https://uploads.strikinglycdn.com/files/675c8785-388f-4728-8a4d-a15391988882/focusrite_scarlett_18i20_3rd_gen_for_sale.pdf
    • http://lulevewutowa.epizy.com/the_crown_season_1_cast_king_edward.pdf
    • https://uploads.strikinglycdn.com/files/26795657-b406-4e33-9339-0459e0dd044c/daisy_miller_character_description.pdf
    • https://s3.amazonaws.com/tugabijenovili/kipudipozi.pdf
    • https://uploads.strikinglycdn.com/files/566048ed-ffcb-41f3-95d5-beda8326020c/21405648803.pdf
    • https://uploads.strikinglycdn.com/files/e654d50b-604c-4458-a333-e3afcf9b2ba8/how_much_for_a_2jz_swap.pdf
    • https://uploads.strikinglycdn.com/files/1ed91524-12d3-4e52-98fb-744b3f033f6e/big_green_egg_large_diameter.pdf
    • https://uploads.strikinglycdn.com/files/1004bf43-ede4-480d-bb78-1480888e75c2/55223266685.pdf
    • https://uploads.strikinglycdn.com/files/9e7365ba-30f3-4068-8f2f-59845a942297/is_the_samsung_ru7100_a_smart_tv.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100d3.bin
6853566c09a7cf60afeec45217a90158f43437b7eee2288c45dd3c0cafe1349a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100D3 5236 bytes
font_01_sfnt_off000112ca.bin
65e8c13e73de867e466b804fb4a98387a719a6eb6cd033f9dd7f639718f290dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112CA 10996 bytes

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