Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e837a2a3750c59…

MALICIOUS

PDF

89.9 KB Created: 2021-01-24 21:06:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d71595d667b7d49c2c17dd1b0db6f0d9 SHA-1: a370e2fbf627eb44d576e4fa1d20cf04dbc22a42 SHA-256: 38e837a2a3750c597333441b385e9b08f70452f2879f5cc3c831380fe692b22f
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating external URI usage and is flagged by a machine learning classifier and ClamAV as malicious. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Call of Cthulhu 7th edition character creation', directing users to a suspicious URL. The presence of embedded URLs and the overall detection by multiple engines strongly suggest a phishing or malware distribution attempt.

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://jottigo.ru/123?utm_term=call+of+cthulhu+7th+edition+character+creation PDF link annotation
    • http://xemopubuga.iblogger.org/22800950896.pdfIn PDF document text
    • http://pravagims.net/tera_endless_war_reviewx8muc.pdfIn PDF document text
    • http://wavepolabipal.22web.org/aankh_maare_hd_mp4.pdfIn PDF document text
    • http://honey-love.ru/liserolupokok9c88.pdfIn PDF document text
    • http://dostafood.xyz/dudifomeneskrus.pdfIn PDF document text
    • http://just-gopro.com/lejenubinakeraxox7yqmw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nupotukig/guidelines_for_diabetes_management_in_schools.pdfIn PDF document text
    • http://kuzebelinebofe.epizy.com/acpi_vpc2004_driver_lenovo.pdfIn PDF document text
    • http://xivubijorudi.epizy.com/36332552907.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/anectine_davis.pdfIn PDF document text
    • http://jepogedepujadul.rf.gd/evaluate_multi-_variable_expressions_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/audit_report_of_private_limited_company_2018.pdfIn PDF document text
    • http://lavodusepigixu.rf.gd/cisco_anyconnect_secure_mobility_client_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/womape.pdfIn PDF document text
    • http://bubexixan.epizy.com/fogofaxegugataj.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/nepun.pdfIn PDF document text
    • http://lonozixugixapap.epizy.com/nba_playoffs_injury_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/steelhead_fishing_guides_oregon.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12361 4916 bytes
SHA-256: 260156f5120c4437c1c5d7ab64936fbd05aef4a353072b76c111bbba9f6051b2
font_01_sfnt_off00013416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13416 11264 bytes
SHA-256: 7f3bfaf2f3214400f698f91d1a1ac8f78401d9d18f4c2e3441fee0beb5a7896d

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