Malicious PDF — malware analysis report

Static analysis result for SHA-256 228a300de7c0b1a8…

MALICIOUS

PDF

75.1 KB Created: 2021-03-09 05:53:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ba6aead424d121d3571c39f49a2faba SHA-1: d1cb2b86f9d056db8b0f1009ce46c375a059fbea SHA-256: 228a300de7c0b1a86008725864967f40647b2af60b1c84c78a36448b20391c1d
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI pointing to a suspicious domain, and the ML classifier strongly flagged it as malicious. The document body, though heavily obfuscated, suggests a lure related to 'allowances' and 'form', aligning with phishing tactics. The presence of an embedded URL further supports the 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://nipisod.ru/123?utm_term=allowances+w+4+form
    • http://gitikevajup.iblogger.org/quantity_surveyor_report_deduction.pdf
    • http://kreativoblako.com/what_is_an_example_of_a_body_paragraphpt82y.pdf
    • http://boost-store.net/aws_redshift_documentationhrtg0.pdf
    • https://puzejiwitamino.weebly.com/uploads/1/3/1/4/131453698/5643163.pdf
    • http://kuxogajow.iblogger.org/26156610875.pdf
    • http://vorecan.fun/bonus_sheet_format_excelwne99.pdf
    • https://static.s123-cdn-static.com/uploads/4494674/normal_5ff44db6c49d9.pdf
    • http://lozaratoz.iblogger.org/gonuzum.pdf
    • http://xaninivinekeni.iblogger.org/asma_bronquial_tratamiento.pdf
    • https://zuramuvo.weebly.com/uploads/1/3/4/4/134480672/pibowo-kizexar-diwufuro.pdf
    • https://cdn-cms.f-static.net/uploads/4410730/normal_600fb9191fef2.pdf
    • https://cdn-cms.f-static.net/uploads/4373999/normal_6040b2ae5c20d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/545f520a-a9f3-4de0-9a9b-0a4a4d8c279b/american_history_x_shower_gif.pdf
    • http://fawepajemug.rf.gd/25298103078.pdf
    • https://uploads.strikinglycdn.com/files/e2f739c7-6309-443f-8eaf-e8c523043557/27888569810.pdf
    • https://s3.amazonaws.com/zarusegibitumet/evan_almighty_2007_full_movie_free.pdf
    • https://s3.amazonaws.com/ditiruz/vutunomevulefuvidififaw.pdf
    • https://uploads.strikinglycdn.com/files/7ff10de1-86ac-4345-bf3b-9b6fb8072370/14766045643.pdf
    • https://s3.amazonaws.com/lewuli/distributed_systems_principles_and_paradigms_2nd_edition_ppt.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_off0000e807.bin
a4713358edf3e33be43396f1e009b62c097c69a0bf8323314265e2400100bfb8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE807 5196 bytes
font_01_sfnt_off0000f9b6.bin
2122d69350918a95ece5672a33f1208ebf0612dea3d1d39e334a258bed42421a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B6 10460 bytes