Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc1bbae2970b1718…

MALICIOUS

PDF

66.5 KB Created: 2021-01-11 20:48:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 42c7c47cc339c5c6cad6130bcdfbf348 SHA-1: f072d0ba6b1128e5e26f2ddcb577fcbd91b65a72 SHA-256: dc1bbae2970b1718e3f2ace68eb0c6473503105e279fd1b5945dfd1440d48561
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=distance+time+graph+worksheet+for+grade+7 PDF link annotation
    • https://site-1180586.mozfiles.com/files/1180586/41932031155.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/VgdKgKa/4273094497.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409238/normal_5ff91ea16085d.pdfIn PDF document text
    • https://cdn.sqhk.co/jesuzedavoti/XfIgduh/talot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419206/normal_5fcdc76846dc4.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/mujesogi/49086252353.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/a_square__b_square__c_square_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/89895331971.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/cbse_guidelines_for_school_canteen.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/13_days_movie_worksheet_answers.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_off0000c402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC402 5772 bytes
SHA-256: 87326692b5e9d066b4558974103bd37d7275710167aadea3097c7b0316dd5b19
font_01_sfnt_off0000d79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79D 11016 bytes
SHA-256: 38fb3ce27ce5c56260368c613c7804aca4141a7dfd0a1ce5af4862f0d3bdf9ab

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