Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a4494580e1d8670…

MALICIOUS

PDF

75.7 KB Created: 2021-04-04 12:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bbf04c871c561f039720fe6567d8e60 SHA-1: d071de116aa4219179c305ce817d5ab817ee08da SHA-256: 7a4494580e1d8670e336bb5e60b108a964ba46af8463c623252a8b5fa46fd7c7
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a technical topic, possibly as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=maximum+bending+stress+of+stainless+steel
    • https://static.s123-cdn-static.com/uploads/4502464/normal_600041c32dd57.pdf
    • https://pakupefo.weebly.com/uploads/1/3/0/7/130776676/rujurof-sopanuvadezi-gulolidumego.pdf
    • https://ponadolofulofuk.weebly.com/uploads/1/3/1/3/131398561/sitajolituwit-gibolobof-nifuxupugi.pdf
    • https://cdn-cms.f-static.net/uploads/4411498/normal_5fda5523e848e.pdf
    • https://cdn-cms.f-static.net/uploads/4489852/normal_603e98cb472b1.pdf
    • http://siviveko.getenjoyment.net/nuwofubeb.pdf
    • https://static.s123-cdn-static.com/uploads/4473632/normal_5ff5855529d06.pdf
    • http://vogolimipogusoz.mypressonline.com/64327294279.pdf
    • https://zowukudikumo.weebly.com/uploads/1/3/1/3/131382828/2639193.pdf
    • http://sakulog.sportsontheweb.net/the_lady_with_the_dog_theme.pdf
    • https://static.s123-cdn-static.com/uploads/4380223/normal_5fc88989c1981.pdf
    • https://static.s123-cdn-static.com/uploads/4481839/normal_5fc920041ecf3.pdf
    • https://cdn-cms.f-static.net/uploads/4408704/normal_6049359eb4d5b.pdf
    • https://static.s123-cdn-static.com/uploads/4491414/normal_5ff2bba8dcef1.pdf
    • http://nixofunok.iblogger.org/icao_annex_17_security.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://takidodaw.rf.gd/safofu.pdf
    • http://jenulozamaberur.epizy.com/tupadogoforil.pdf
    • http://lenoguxeg.rf.gd/xiwojodap.pdf
    • http://vudutetadi.epizy.com/linus_and_lucy_sheet_music_violin.pdf
    • http://juwebud.epizy.com/wrong_turn_2_movie_in_tamilyogi.pdf
    • http://zumemopusel.rf.gd/22166698851.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_off0000e8b9.bin
df17674e155520e9af813e4abe4cfc5464a287292ea1b63a7827c80f84f2b393
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B9 5440 bytes
font_01_sfnt_off0000fb30.bin
0900b407f89cb2d7bde053d6f85b271d6662f736de0ace824dd383dc2cf944c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB30 10592 bytes