Malicious PDF — malware analysis report

Static analysis result for SHA-256 df422f86fbf80341…

MALICIOUS

PDF

76.0 KB Created: 2021-04-08 17:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cfcca6108afb0cba2229d3cd6c79abe SHA-1: 5be8395d58d5c339ab6dcdc6de5bdb43617cae96 SHA-256: df422f86fbf803419c8ef80693ca682418941f20245fc5a2ed0dfd6a64c506c0
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious URL. The ML classifier and ClamAV detection strongly indicate maliciousness, likely a phishing attempt or a lure to download further malware. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=tom+clancy+novels+made+into+movies
    • http://gaxesujite.medianewsonline.com/plate_tectonics_crossword_puzzle_answer_key_1-17.pdf
    • https://cdn.sqhk.co/rirakibugo/hcNhdgj/zupuwajanidoti.pdf
    • https://cdn-cms.f-static.net/uploads/4459774/normal_5fd264b87f31d.pdf
    • http://wosozage.mypressonline.com/agri_coaching_chandigarh_notes.pdf
    • https://static.s123-cdn-static.com/uploads/4472188/normal_5fdef83828e66.pdf
    • https://cdn-cms.f-static.net/uploads/4476418/normal_604866a8c72cd.pdf
    • http://guketaz.iblogger.org/nipafiguwivizidij.pdf
    • https://cdn-cms.f-static.net/uploads/4369629/normal_600dd3424617e.pdf
    • https://static.s123-cdn-static.com/uploads/4459323/normal_5ff802bca807a.pdf
    • https://cdn.sqhk.co/godanalumado/gVhadjf/wimejo.pdf
    • http://korogesubelokut.mypressonline.com/les_b_lactamines.pdf
    • http://lifizix.22web.org/nutis.pdf
    • https://static.s123-cdn-static.com/uploads/4448724/normal_5fff2e6ba138e.pdf
    • https://cdn-cms.f-static.net/uploads/4379618/normal_601dcff0f393b.pdf
    • https://cdn.sqhk.co/sawowudin/hYhidie/duzudotano.pdf
    • https://cdn-cms.f-static.net/uploads/4366388/normal_601a002839cd0.pdf
    • https://static.s123-cdn-static.com/uploads/4370090/normal_5fcf93e901f0f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://litorow.myartsonline.com/79009918497.pdf
    • http://vexukaxazixaxet.epizy.com/mobile_application_development_textbook_free.pdf
    • http://gubadif.myartsonline.com/vapafenotovikinemabe.pdf
    • http://rabejaje.epizy.com/does_covid_19_cause_anxiety_attacks.pdf
    • http://julisanusifi.rf.gd/jovemiteruxanititu.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_off0000ee05.bin
ed56daf9d591c65f08a74017b7cb7a7baec7df7d6ff7bcb246857ffe6ea6611b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE05 5100 bytes
font_01_sfnt_off0000ff5a.bin
6b5eba66de6c154790c25cf824ab0d37b0f1644da9e5a12bb396fe6b697f71f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5A 10536 bytes