Malicious PDF — malware analysis report

Static analysis result for SHA-256 521037d3426ea68e…

MALICIOUS

PDF

88.2 KB Created: 2021-03-28 01:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1469320e55f38d156e075dc76eef4209 SHA-1: bd6c7fac7de763532cc43a3862ed7c27728a8c70 SHA-256: 521037d3426ea68e42b2a13a1096ebfbe07cdca939905501551b77419a76fc1b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, appears to be a lure related to a search query, suggesting a phishing or redirection attempt. The presence of multiple unknown URLs further supports the malicious nature of the document.

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://baarspo.ru/strik?utm_term=what+is+the+summary+of+the+phantom+of+the+opera
    • http://gejesixave.scienceontheweb.net/85819182020.pdf
    • https://static.s123-cdn-static.com/uploads/4417834/normal_5fcd3d287906c.pdf
    • http://mapitunokon.22web.org/clause_49_of_listing_agreement.pdf
    • http://dipazekonowa.mypressonline.com/fotinejitalobotunari.pdf
    • http://roxelejabojafe.scienceontheweb.net/wagodorol.pdf
    • https://cdn-cms.f-static.net/uploads/4386851/normal_5fe99595decb4.pdf
    • https://cdn-cms.f-static.net/uploads/4471723/normal_601b5d3378c29.pdf
    • https://static.s123-cdn-static.com/uploads/4465565/normal_5fe1b949ddc91.pdf
    • http://mitutepoka.medianewsonline.com/adenomas_hipofisarios_2020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rebesudanolo/64766911157.pdf
    • https://s3.amazonaws.com/zikeko/100s_chart_fill_in_the_blank.pdf
    • https://s3.amazonaws.com/jikopot/gozifukibifunikakejamip.pdf
    • https://s3.amazonaws.com/zaxefemebidaz/the_power_of_the_powerless_christopher_de_vinck.pdf
    • https://s3.amazonaws.com/povodijirig/daraf.pdf
    • https://s3.amazonaws.com/jivamubug/amparo_indirecto_laboral_formato.pdf
    • https://s3.amazonaws.com/mivokozibu/pebamoburetugoxire.pdf
    • http://jasivirenum.rf.gd/bescherelle_italien_grammaire.pdf
    • http://sagoralezerelo.onlinewebshop.net/prasad_biochemistry_download.pdf
    • https://s3.amazonaws.com/juzowilipi/computer_basics_worksheet_answer.pdf
    • http://tavoxelelenasi.onlinewebshop.net/16642453461.pdf
    • https://s3.amazonaws.com/bezutu/detosutinizowopufitapok.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_off00011a95.bin
516e2d4531c24d784ee19b98a11fe8d6962c4926b18e23ddef84a7a892c2acd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A95 5224 bytes
font_01_sfnt_off00012c47.bin
ce3e8b0ca32e279b7445e8b79f46ec53b529ff250f011c74aa3e7bc9a378339a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C47 11536 bytes