Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08ff48a10ecb0c5…

MALICIOUS

PDF

67.9 KB Created: 2020-11-11 06:07:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8742a5f59081951fe7fa692d44c4c1bc SHA-1: d9da0203442bacae35d872091c2f833880c4ca15 SHA-256: d08ff48a10ecb0c5505858e5e5884c85df1c2c181fbefec280e8272d5c613470
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 0.9983

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/aws?keyword=profesorado+en+artes+plasticas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5f88f2bb2a52c.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/tarajix/sellers_childrens_library.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f48e789-8931-40cd-b76c-90b69819bc2f/zedadujokoma.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/64438428561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f535f7e-495d-4019-84cd-40e0fb2b5207/70338131611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f21e642-5ee1-4756-9f60-968b2f9063d6/triple_monitor_mount_ultrawide.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/free_beat_maker_software_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/lanowilovuviwib/kaiser_hret_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/8722109185.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_off0000cbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF0 5152 bytes
SHA-256: 3b5a1e881da819e3300429a0092b42d73351b67fbd92f523df80ecf61bf1ab2c
font_01_sfnt_off0000dd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 11096 bytes
SHA-256: 2718b0705720fe7d5aa11524cc60292ba6f7c433460485ab370320ba5c1d3963

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