Malicious PDF — malware analysis report

Static analysis result for SHA-256 13c9f275068e43d1…

MALICIOUS

PDF

75.2 KB Created: 2021-04-15 06:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5aaec30afaa0a33cd638f751b4f6562 SHA-1: a54fd502f6b5786d402a34531bcada0b7f028707 SHA-256: 13c9f275068e43d16c7b5646c54721f1df1129e358ed2713a6376a5b0776950f
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://dafemum.ru/strik?utm_term=matricom+g-box+q3+remote+not+working', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to a 'Matricom g-box q3 remote not working' issue, suggesting a pretext for the malicious link.

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://dafemum.ru/strik?utm_term=matricom+g-box+q3+remote+not+working
    • http://rugegav.mywebcommunity.org/twin_star_international_fireplace_heater.pdf
    • https://cdn.sqhk.co/rojarasam/f0hejhk/18776382559.pdf
    • http://sozefavi.22web.org/letemobeluwetopusajoweb.pdf
    • http://ninuxalezopo.getenjoyment.net/lanogegugevaze.pdf
    • https://cdn.sqhk.co/kerikone/yBhfXjh/legaxumenofegetafusenupes.pdf
    • http://runavowof.22web.org/xazomiwikujuwutam.pdf
    • http://zuvels.xyz/74585588984f13h4.pdf
    • http://bepidotagexaxuw.iblogger.org/air_cooled_chiller_diagram.pdf
    • http://remastacer.com/83658233148sc0mn.pdf
    • http://tofotibuwul.sportsontheweb.net/speaking_activities_for_kindergarten.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_1e7c331874854c2c8940e435ffb48d6e.pdf?index=true
    • http://xesapekaf.epizy.com/jirekixibovip.pdf
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_7369889a4331434a9812fc7a0960b24e.pdf?index=true
    • http://fegedenem.rf.gd/rinegelam.pdf
    • https://96daf755-36ed-4ece-a185-bed8db3f70ea.filesusr.com/ugd/a95cda_6c1eb1d8e6f044eea85ec6f8f1514cad.pdf?index=true
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_6b98d556b5b14da5860f3e3c38b2e1a6.pdf?index=true
    • http://pekowob.onlinewebshop.net/affirmative_action_pros_and_cons.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dac7.bin
b0baeb4fc0e7126b4e80883c178a15b9b166e21824b53cc4e6a7b9677cd59f16
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC7 5388 bytes
font_01_sfnt_off0000ed25.bin
17c5c1400ac55609d437187bac60fec1dad23b779b8c6be44cfe62620801a576
pdf-font-stream PDF embedded font (sfnt) at offset 0xED25 10776 bytes
font_02_sfnt_off000111c5.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x111C5 4324 bytes