Malicious PDF — malware analysis report

Static analysis result for SHA-256 3741c944c266cb47…

MALICIOUS

PDF

78.1 KB Created: 2020-11-17 15:05:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2bb6b1e8239889e07be0c09056d881da SHA-1: 7f2b62aec0c614384c42171e85d80900d6748952 SHA-256: 3741c944c266cb47aad91324a720319b49584f2acfe35ca04374264553da5f0c
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to historical documents, aligning with spearphishing tactics.

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://traffnew.ru/strik?utm_term=introduccion+a+la+historia+marc+bloch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f9f78e6df351.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/busutafitufe/cassia_spectabilis.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/unblocked_movies_2018_the_hate_you_give.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc80b6e1-daba-47e3-b737-c7ba2e22ada9/zifubikuleref.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/observational_study_vs_experiment_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/best_man_speech_template_brother_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/jetewavenorama.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/xukekijikamenumipimuwezoj.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/pepper_moth_lab_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/sezutuma/tajilube.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/slotomania_mod_apk_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB67 5020 bytes
SHA-256: 2f107172e0d2a9f720402d5b32d04cbd06da61fe6662698827cb8d35468554e2
font_01_sfnt_off0000fc2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2F 9796 bytes
SHA-256: 706dd52f1d41671baf4014ed80adfd33806939f0cff822db44ab17bce7ef0337
font_02_sfnt_off00011da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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