Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c9eb3c8daad2a4…

MALICIOUS

PDF

75.6 KB Created: 2021-03-20 18:06:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 13dc4380b8373c97116764a26678fa48 SHA-1: 435d86d61b7de1e4ff75a929e9551c5b12003478 SHA-256: e2c9eb3c8daad2a489306f51af6f95d69ff5ca7258d928bcf7f4fb51d997a53d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a phishing or SEO manipulation attempt. ClamAV detection and ML classification strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://rigodit.iblogger.org/gagowemosutituvepaki.pdf In PDF document text
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/xekojaw.pdfIn PDF document text
    • http://vigikigopaloze.medianewsonline.com/vizio_sound_bar_ge_universal_remote_code.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/star_wars_death_star_levitating_bluetooth_speaker.pdfIn PDF document text
    • https://kigokevorusom.weebly.com/uploads/1/3/4/7/134709893/994a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/dRGGkpkNhSI/wb?keyword=pe%20exam%20requirements%20coloradoPDF link annotation
    • http://nakarajibap.myartsonline.com/econometrics_and_machine_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/69809270056.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/bloodborne_pathogens_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/answercallbackquery_telegram_example.pdfIn PDF document text
    • http://nikibulafejew.rf.gd/59930792653.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/14128705323.pdfIn PDF document text
    • http://zotubetujuna.rf.gd/what_are_your_hobbies_interview_answer.pdfIn PDF document text
    • http://vebagakid.onlinewebshop.net/nicholas_sparks_latest_books_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/fejugujukunede.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/conversations_with_isaiah_berlin.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/mapa_bosque_de_chapultepec.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/98730667463.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/to_kill_a_mockingbird_summary_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/67628076899.pdfIn PDF document text
    • http://xisebekixow.epizy.com/70120042513.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_off0000e9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A4 5280 bytes
SHA-256: 1ea0c64442ef3e7102ee37da060e4bc5a2c8ef5a1a8852b043db8a2742492592
font_01_sfnt_off0000fb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7D 11092 bytes
SHA-256: 0285b1be83023c44874d4b4d60bddb32e7a67edf6895dbe8d49fc7e5774f9b64

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