Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce51fdd2d0827831…

MALICIOUS

PDF

66.2 KB Created: 2020-12-19 07:57:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 614ed600590072b7e73e28b8ad2a641c SHA-1: 98b06da5dec8ff0a1305e6e721bf3dfc6d9c695e SHA-256: ce51fdd2d08278317c10be9bfe55137a6b17d38cf5fe55e80487ba82248fff78
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/strik?utm_term=excel+2003+merge+cells+shortcut In 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/2c10c349-47d9-4d81-b864-fbcf9669db06/parisian_chic_a_style_guide_by_ines_de_la_fressange.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b303d9b8-e29c-4868-abbc-64effeea3906/duranojuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dad39eb-9508-4158-a400-4209442de6bd/23128046043.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/25619339924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cff51f87-878f-4915-8b15-772f5a14cf38/domazidezavijitima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/362ebc3d-8e88-4166-a133-e6abff12719b/gokumitakukomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ce1d315-b157-484c-86de-f1cca9b114ab/domuxokuvepuresolaputikar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f9ac631-b306-4ea6-8bfe-0cab70c64ff7/mobarusujitoxanipegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eefc5b1-f0e6-4dc0-bd0d-6ca1531866f3/56048022936.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/15045587162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec07bb7c-0928-4061-a3e9-c5d70196fe8b/frie_bevgelsesklip_til_kraftpoint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/517341f3-9ee7-471f-a9d3-699cdf064eaf/manual_blood_pressure_monitors_for_home_use.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd044fdae50a0145884de4/1606222927333/jijufezunu.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_off0000c40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC40F 5464 bytes
SHA-256: 6f9120d412a87f6905a798b84338f86db38e24fd4fd31ff5d0fcca1cb972760b
font_01_sfnt_off0000d690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD690 10952 bytes
SHA-256: 5aab3685b75fa04ca3b6cdda3f22472ee50b432d4e3e4a62764a852698a71736

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