Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee031fbf46ae0282…

MALICIOUS

PDF

75.5 KB Created: 2021-03-28 16:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4e747f3505e5f5a2f6611cf3603cb30 SHA-1: 774ec4e5142539eb2cfeef9c47348a0f68d6a0a8 SHA-256: ee031fbf46ae02827f94908287272dcd51addc89a9b1fb1dbba8d562bea3a852
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The embedded URL points to a domain that is likely part of a phishing or malware distribution scheme, disguised as a PDF download. The document body, though heavily obfuscated, contains keywords related to the PDF's purported content, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/award?keyword=biblical+hebrew+an+introductory+grammar+kelley+pdf
    • https://static.s123-cdn-static.com/uploads/4414500/normal_6000047a8b6a2.pdf
    • https://static.s123-cdn-static.com/uploads/4484370/normal_5fcf6f43b0678.pdf
    • http://nizozipup.22web.org/is_wolf_of_wall_street_on_netflix_australia.pdf
    • http://wigalelo.22web.org/42982723726.pdf
    • https://cdn-cms.f-static.net/uploads/4459477/normal_60199d14f41f5.pdf
    • https://cdn-cms.f-static.net/uploads/4489596/normal_600c1765e4cc8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kexobub.rf.gd/how_does_emdr_work_for_complex_ptsd.pdf
    • https://uploads.strikinglycdn.com/files/ceb16342-41f0-43a1-af6f-11a553013ca4/6_times_tables_worksheets.pdf
    • http://vanazabeso.epizy.com/hackintosh_guide_high_sierra.pdf
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_9d332fc38d734e748ab7b5f3f014bf1b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0f546453-7ab5-4a16-9912-08752c79d647/nortel_norstar_m7310_telephone_nt8b20.pdf
    • https://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_130ed614cb0a4efb867ce8e58c676114.pdf?index=true
    • http://nemidet.epizy.com/calculo_amperes_transformador.pdf
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_246e1ff541144e6299a13f9a6cd959cb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/56bca285-71ac-4ac2-9a93-b6e24c81bcd7/20746862857.pdf
    • http://wegoxoxajenugol.rf.gd/68079929113.pdf
    • https://uploads.strikinglycdn.com/files/75b0476f-3ac9-43bd-a098-e75c9941ad19/how_to_write_a_short_essay_250_words.pdf
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_b2117f979aee4c349a12009c5359962f.pdf?index=true
    • 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_off0000e846.bin
92995b45acd775016c45d1eaa3993c0311cf81686024cd4c14dcb6191b540fc5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE846 5840 bytes
font_01_sfnt_off0000fc18.bin
53d4190f74bcad481cd2b0a719c8b08ecf196fad73d6074489616a10ca74381e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC18 10620 bytes