Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f164aeaf7449f5e…

MALICIOUS

PDF

78.8 KB Created: 2021-03-10 17:01:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26205e26dd9e7806de22a114871714da SHA-1: ee18c6fb2431a62dc6fcacefa463421ae70baea0 SHA-256: 8f164aeaf7449f5e3ff571085ebf37a0706cdc007185daa869d9395cfa863eac
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the presence of external URIs suggests a downloader or phishing lure.

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://vilenefex.ru/award?keyword=attribution+theory+of+motivation+pdf
    • http://muzidos.iblogger.org/jibab.pdf
    • https://static.s123-cdn-static.com/uploads/4452372/normal_5ff8fd21a0704.pdf
    • https://static.s123-cdn-static.com/uploads/4486550/normal_5fc5cce9c567f.pdf
    • http://gujafitixa.iblogger.org/autosar_basic_software_module_description_template.pdf
    • https://cdn-cms.f-static.net/uploads/4481406/normal_6046b4fce8ea5.pdf
    • http://love-cosmetics.shop/sunday_times_cryptic_crossword_answerstkv1h.pdf
    • https://cdn-cms.f-static.net/uploads/4407733/normal_601739a2f0a0e.pdf
    • http://vizit.store/99520140449rfzgr.pdf
    • http://zizuvipo.iblogger.org/63033913737.pdf
    • https://static.s123-cdn-static.com/uploads/4421639/normal_5fff640d1501e.pdf
    • http://mybiol.site/27237027182ih8fy.pdf
    • http://mscredit.info/94555398072yxhsa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_8492c91524f44b83a5d44f1d7e463fa7.pdf?index=true
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_744732bfb853484582ca1f9dbc4bd5d1.pdf?index=true
    • http://nojubeweba.epizy.com/marriage_day_wishes_images_free.pdf
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_689165f6037645e9aa053434aef37116.pdf?index=true
    • http://dukedofabi.epizy.com/37177935365.pdf
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_35fa1f5fe761461bbddcba487c1675ea.pdf?index=true
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_11da1ee58ae94bacaefd0f832915800d.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_off0000f84e.bin
1301f74c59607cae6eb172b816b9f6b050ef323f8a2f03a2cad3db9a41e637e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF84E 5364 bytes
font_01_sfnt_off00010a70.bin
5edb661d27727a6bd6a0da3d23eb776f1b1af5bcbfe047f88b4468e77016f6be
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A70 10492 bytes