Malicious PDF — malware analysis report

Static analysis result for SHA-256 63fc81c9989b0b07…

MALICIOUS

PDF

75.2 KB Created: 2020-12-03 05:03:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4b24b51731f1a73bea2edb1a4db4369d SHA-1: 9d3010e52324159bc1c98a04e1a85ade184a5926 SHA-256: 63fc81c9989b0b079c814860f772080f7f9a2addf4475da4607ef7904d442745
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/strik?utm_term=scp+069+scream PDF link annotation
    • https://saxejuwujare.weebly.com/uploads/1/3/4/4/134448786/f2cf30.pdfIn PDF document text
    • https://nimimemuxigu.weebly.com/uploads/1/3/4/4/134488465/xinibuboxawomi-gijenasasowo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f88f301a7c38.pdfIn PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/768418.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/xatuxuz.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/megodipewukitoj/dixamejifedel.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/asia_maps_image.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/breach_movie_dual_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/lyrics_to_stagger_lee_grateful_dead.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf536ffa04221c71172b00/1606374256030/the_fosters_brandon_instagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/049ad51d-0f91-4d07-9ab0-7fc4ae24f8dd/xatudanalotixinifibipuviw.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD387 5600 bytes
SHA-256: 82a4a4fcc71e355b30cb49726d7ba731db42d5e96e99394f188148b0486ac896
font_01_sfnt_off0000e674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 10140 bytes
SHA-256: 6b12cbea553d534d0e96165223243d17d80b844947a1e62877dd65668eb3abe2
font_02_sfnt_off00010978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10978 16140 bytes
SHA-256: 00468df452218f546d59995a7cf9b4297092e2fd476dbd2f6ce79846bd051107

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