Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ecdebcd6468258…

MALICIOUS

PDF

89.6 KB Created: 2021-03-22 01:24:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86679095e791c970bfc43d0e306a1291 SHA-1: 6f64011fe97a82b2bbbd993dcb7345f3fd4be440 SHA-256: e8ecdebcd6468258d0670e01e257da91ddbfb9eec48a35619e120f092a7c3be2
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'resalured.ru', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to 'Umich ipe engineering', likely intended to trick users into clicking the malicious link. No scripts were extracted, but the PDF structure and embedded URI are sufficient to infer a phishing attack pattern.

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/wix?keyword=umich+ipe+engineering
    • https://cdn.sqhk.co/nazujovo/iajjyNe/franchise_hockey_manager_2020.pdf
    • https://cdn.sqhk.co/tevotapomow/ChhO0rz/mauricio_rua_vs_paul_craig_mma_core.pdf
    • http://alternativeinfluencenetwork.net/wivifinegokalagigej1qrv8.pdf
    • http://luxisulejoxo.getenjoyment.net/bankruptcy_act_1967_malaysia.pdf
    • http://fuxezaboxekave.scienceontheweb.net/sutijefireluzuvemopizuwo.pdf
    • http://itdiscounts.info/sekizofaxokonuxabobidutam1l4.pdf
    • https://cdn.sqhk.co/jesarijufe/OAjhhgw/80247687677.pdf
    • http://elinekici.online/7574056566mffy2.pdf
    • http://pumaguli.scienceontheweb.net/18070216228.pdf
    • http://lalashoppen.online/zuwabufsveo.pdf
    • http://nanolenka.xyz/gidazowatel6sjts.pdf
    • http://idealica-italy.site/barska_top_open_keypad_safe2g85c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jetotajasavesi.atwebpages.com/49239063997.pdf
    • https://uploads.strikinglycdn.com/files/e6b16800-65bd-4554-94a9-adca0b94044d/ryobi_7_1_4_sliding_miter_saw_stand.pdf
    • https://f3b86e06-b3aa-4ee1-82f7-79049f3379a8.filesusr.com/ugd/0c4fd2_ed25af6abaed4ab684ae3e8f32b9bfb7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a2c0e80b-207c-4d55-bb9e-d8f8890b9c05/standard_painting_canvas_sizes_in_cm.pdf
    • https://uploads.strikinglycdn.com/files/ed28f32b-33db-4ac7-95d9-82ada54e317b/89086048878.pdf
    • https://f0ded7c6-1882-44c2-b580-3fd8daacf182.filesusr.com/ugd/1cd4ca_15cb8198cd0649d89db54f5acddaabb0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eb0aeb7f-2aaf-41db-8313-244fbee71731/59243286574.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_off00011e91.bin
db8b73297fe6e8b80fcc13a3978701c4238469d4e599b55ddea7d091a7a0c361
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E91 4920 bytes
font_01_sfnt_off00012f2d.bin
09e324bcd76e8e6ff83ff509d29100cba6f22c802fa725d17666b6aee0433c65
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2D 13140 bytes