Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c4acea90bfee57…

MALICIOUS

PDF

70.9 KB Created: 2021-01-08 18:09:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 94943c1bdb6f285dd4db9d524d461bd7 SHA-1: 893bae8719c64b2092ab51422c299e1fb3a8a8b5 SHA-256: 86c4acea90bfee571a9752d5581dd5a4102bdf0088866a7e6feac989b2c54188
156 Risk Score

Malware Insights

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

This PDF file is classified as malicious, exhibiting characteristics of a phishing lure. It contains a link farm with numerous external PDF links, suggesting an attempt to direct users to malicious content under the guise of offering a free ebook. The presence of external URIs and the ML classifier's high confidence score support this assessment.

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://traffnew.ru/123?utm_term=dorothy+must+die+ebook+free+download PDF link annotation
    • https://cdn.sqhk.co/sawusuzi/RXaW0WU/nixumuzodivoloberofo.pdfIn PDF document text
    • https://cdn.sqhk.co/rijakobebux/cGvjeEf/19831067477.pdfIn PDF document text
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/6102775.pdfIn PDF document text
    • https://cdn.sqhk.co/mejapevelu/yjcOSvY/batekivemid.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/1d29c76a-e74e-4c29-92fe-4cb930069d95/63106454196.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/32169534009.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/52778408977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c33752ae-cd7f-4696-861f-63b9996892f1/vevuzafuwiwefezobal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdcbba5e-9aad-44c2-9a7c-089ec8bfec89/marvel_strike_force_free_power_cores.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/avery_template_5167_for_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4818e1b1-0df4-4528-a8a0-7b5eabe53b06/druid_handbook_pathfinder.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_off0000d237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD237 5544 bytes
SHA-256: 64622302a5c41799f0efff399d1bb74a4f42ec5e93c128c7e02fc5b829116eb3
font_01_sfnt_off0000e4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FC 12996 bytes
SHA-256: 7c46dcc7d1ee140f6f2b561b8cd976ad6ee1d9156dd56eee1e2d3b4948dbef6a