Malicious PDF — malware analysis report

Static analysis result for SHA-256 575956c7b449ccdc…

MALICIOUS

PDF

72.1 KB Created: 2021-05-23 16:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ff29e4bcf619fde7ee53fe46fb4ba9c4 SHA-1: 1794b3b299e36fe038636070632305617209cc6f SHA-256: 575956c7b449ccdc5a4e6905262502e2bbd62fdad8f9348c49c2f284d0b25c3b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely used to host or deliver a malicious payload. The document body, though heavily obfuscated, suggests a lure related to a popular content creator's PDF, indicating a phishing or social engineering 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://soxebez.ru/strik?utm_term=livro+felipe+neto+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4405644/normal_5fe2bfacc0994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484618/normal_6039f05643750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488555/normal_606d9d4cf0f0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382414/normal_6015bccc3cf15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448126/normal_605f4a3c7a188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_605a71c558560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414164/normal_603fefdf68ee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482863/normal_603f7e3abaf2f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/63485396-a44e-4117-aa9b-143cac640698/21909977243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72e7cc08-a115-4c02-b7a2-2de29bcb3201/should_you_put_milk_in_a_smoothie.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/55041813354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d361f2e-4b33-4f47-933b-36f69ce7e060/democracy_in_black_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aa5573a-1cd6-49d5-ba65-1610cb121faa/rogiwunukuxalanupeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a9ad5c-714a-42a5-97ee-dcd087006df3/century_fc_90_welder_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d97bdd-28b5-4f76-9b27-1b1e401b1d1b/pwm_solar_charge_controller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3b9410f-e248-4086-ab42-cb59f40152ea/sorokisamedenobepo.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/bhoot_fm_7_september_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c6e80e7-246a-426d-93a6-ca767d648352/monewuw.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_off0000d9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AA 4952 bytes
SHA-256: e86187fc1019fb4c156d2b86bfb4776e44c86ee01d1c793e7a4d4a116b741df1
font_01_sfnt_off0000eab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB1 13096 bytes
SHA-256: 3529c14a2ba58d1b5dd4788946e779aef9cef088dad11248d1397a32141d1032

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