Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e4132bd3c71071…

MALICIOUS

PDF

71.4 KB Created: 2020-11-10 11:58:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 335f3278b947b1a07ceffab12c7f97cf SHA-1: bd38de935edcf24a610dde9643fedf7f55a260de SHA-256: 00e4132bd3c71071985ff2b9196da15d3365baa2c6b80ccf3161c95876c4ac49
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a high-severity ML classification. The document contains a large number of embedded URLs, suggesting a link farm designed to distribute malicious content or phish users. No scripts were extracted, but the presence of numerous external links points to a redirection-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?keyword=the+red+queen+pdf
    • https://nofakefol.weebly.com/uploads/1/3/4/3/134341926/guxenuxiwok_zaruxaxape.pdf
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5f8dddaf3830c.pdf
    • https://natemavobu.weebly.com/uploads/1/3/4/3/134349428/2422002.pdf
    • https://pakedarisibibo.weebly.com/uploads/1/3/4/5/134501134/7cce49cb.pdf
    • https://cdn-cms.f-static.net/uploads/4388050/normal_5fa0ee81e2d6b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0a463ff6-0e9f-4c54-90c8-e16ecbd1cefc/notujedapaluwamujupofalom.pdf
    • https://uploads.strikinglycdn.com/files/c1bd281e-d41d-4542-8f99-23783a03d251/10289894235.pdf
    • https://uploads.strikinglycdn.com/files/6675c54c-c579-43bd-9db7-2523ae5cc167/whatsapp_apk_pour_windows_phone.pdf
    • https://uploads.strikinglycdn.com/files/0d8411d2-9508-4fc7-8a89-927f9b1e5c66/lakeland_auto_mall_reviews.pdf
    • https://uploads.strikinglycdn.com/files/1a2af037-ec58-4d6b-af3e-bf87c8c2fd1b/chick_fil_a_donation_request_san_antonio.pdf
    • https://uploads.strikinglycdn.com/files/a3282d34-3d3e-4aff-bcf9-625fa5148472/manhattan_5lb_2018.pdf
    • https://uploads.strikinglycdn.com/files/34c3e3e7-4e16-4662-8c05-0563d13a98ce/33595582807.pdf
    • https://uploads.strikinglycdn.com/files/f496d915-d0d6-47d1-8bc3-53c44979b717/zijemajanesebapu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbe8.bin
55193c8a044b72708867cbafb29f3380bee5f026048a10044feb0c4e2da28b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE8 4784 bytes
font_01_sfnt_off0000ec20.bin
ebb2a2c4da517d1f9ca6f6f459b39dd73d34b8e54cf4c5d518a14f0de19e50de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC20 11200 bytes

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