Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d8d23f196bf8e72…

MALICIOUS

PDF

75.2 KB Created: 2021-01-25 00:09:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e32a1924bccd00d09ccf58d67867e0bc SHA-1: e531a97bbd00d7f34d0d8a41956abb9884d80639 SHA-256: 4d8d23f196bf8e7211bd85f32ebd52b1ba8a6f12c55a0dbc22d12e328732017e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to a 'Harmony 700 universal remote manual', suggesting a lure. The embedded URL points to a domain that has been associated with malicious activity, likely serving as a download source for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jottigo.ru/123?utm_term=harmony+700+universal+remote+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4401711/normal_5ffb9f6adc325.pdfIn PDF document text
    • http://muruxilirafet.iblogger.org/essel_group_annual_report.pdfIn PDF document text
    • https://dekitinuro.weebly.com/uploads/1/3/4/8/134871397/rukokegurezededap.pdfIn PDF document text
    • https://guretaximijogu.weebly.com/uploads/1/3/0/7/130739376/510082966.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412408/normal_5fef7dd378bb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446280/normal_600b19233da68.pdfIn PDF document text
    • https://toroborelap.weebly.com/uploads/1/3/4/8/134867907/bosidomigonenut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_5fd8d553a4299.pdfIn PDF document text
    • https://kidubaviputotej.weebly.com/uploads/1/3/4/5/134520398/domitof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489596/normal_5fcd27273f03f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422150/normal_5ff68046336df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447434/normal_5fe9f43e31c0f.pdfIn PDF document text
    • http://pafekusiwajida.66ghz.com/31060178900.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485568/normal_6005ec1bb123c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482848/normal_5fe787e5ae07a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/38706086817.pdfIn PDF document text
    • http://gixisenusadat.rf.gd/25599477461.pdfIn PDF document text
    • http://rakimeramut.epizy.com/13191095361.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/51111583160.pdfIn PDF document text
    • http://jigufabusu.epizy.com/tateted.pdfIn PDF document text
    • http://ramapenutizawa.epizy.com/96137490293.pdfIn PDF document text
    • http://borovob.epizy.com/nagasivetilipux.pdfIn PDF document text
    • http://gaxufaxurawago.epizy.com/29381983149.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_off0000e8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B5 5176 bytes
SHA-256: 27aad744207e89f51216f29f45d82e3db9e8911ae1b4655bbb57642155a8f421
font_01_sfnt_off0000fa43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA43 10700 bytes
SHA-256: c95a5af1669c9a83a70ccbbb43e24ab2178970af27dce75ae235a1e65d53c995

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