Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9964191b0633ad6…

MALICIOUS

PDF

91.1 KB Created: 2021-03-03 10:11:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ea57cc7a40e790227de6606d9a28df26 SHA-1: a1c2e8df7b73419227842d2571df7bf133325b71 SHA-256: a9964191b0633ad604b11835ea82e68ba45c0c24d04627073465f974299a6180
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search query for 'Behringer mixer effects list', likely intended to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan. No scripts were extracted, but the presence of an external URI and the overall detection profile suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wb?keyword=behringer%20mixer%20effects%20list PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447101/normal_6007550407b25.pdfIn PDF document text
    • https://cdn.sqhk.co/rufadexu/gjBha4Q/jotopuxofoz.pdfIn PDF document text
    • http://borezopesane.22web.org/server_2008_certificate_templates_not_showing_up.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454968/normal_5ffe4d800dba8.pdfIn PDF document text
    • http://businessoutsourcing.org/playboy_playmates_1980sz0g9m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_6019b17a57a74.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/8ChhWhc/vowukamivukubevigevix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381756/normal_5fca59ebcf0ff.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/bggtBih/xibozexasulananev.pdfIn PDF document text
    • https://cdn.sqhk.co/lojeliju/ghijioz/plants_mod_minecraft_1._14_4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472186/normal_60223c8352ec4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410415/normal_5feaf1568f6b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368951/normal_5ff09a11a5d6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443812/normal_5fc6bf0edaf1d.pdfIn PDF document text
    • http://teplotronic.ru/pottery_logo_stampdfry2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_60272fea6736b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wusumuforibit.epizy.com/claim_form_for_unclaimed_property_in_florida.pdfIn PDF document text
    • http://napalujimawoz.rf.gd/gowebesevuvijaruwusa.pdfIn PDF document text
    • http://golokelu.rf.gd/crazy_frog_dance_mp4.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A0 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off00012487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12487 5200 bytes
SHA-256: 3a5826f4747e2219fd35d7deb73fe316da1b4018b0c45efbdcddd935792f8ca3
font_02_sfnt_off00013625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13625 11316 bytes
SHA-256: 57ce168b66f277bdeaab89e7c5c8d904120ca2c79c528df0c0bec6d5d6641eca

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