Malicious PDF — malware analysis report

Static analysis result for SHA-256 15924387ed33fc7c…

MALICIOUS

PDF

36.6 KB Created: 2020-10-09 10:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b2475aac5be14d6cbeb30acf62fe837d SHA-1: 39c655c391839cacc29ef0e3e39168084bfc2e02 SHA-256: 15924387ed33fc7c974d898303e7a295e9fb244ea6153fee99161f44d9e541c8
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=motorola+hk250+instructions In PDF document text
    • https://site-1045328.mozfiles.com/files/1045328/xutobowarufe.pdfIn PDF document text
    • https://site-1040359.mozfiles.com/files/1040359/gizuderu.pdfIn PDF document text
    • https://site-1039777.mozfiles.com/files/1039777/lapuduzojogipuzaminelotaf.pdfIn PDF document text
    • https://site-1040567.mozfiles.com/files/1040567/27314678320.pdfIn PDF document text
    • https://site-1039421.mozfiles.com/files/1039421/16409427997.pdfIn PDF document text
    • http://dovukonif.willkahampi.org/uploads/1/3/1/6/131636881/7129766.pdfIn PDF document text
    • http://files.kshnisbetarteach.com/uploads/1/3/1/6/131606168/5750171.pdfIn PDF document text
    • https://site-1037835.mozfiles.com/files/1037835/68063619790.pdfIn PDF document text
    • https://site-1039517.mozfiles.com/files/1039517/fedamewimuroma.pdfIn PDF document text
    • https://site-1043669.mozfiles.com/files/1043669/xorekijoparimopigip.pdfIn PDF document text
    • https://site-1036911.mozfiles.com/files/1036911/rasonojaraku.pdfIn PDF document text
    • https://site-1042016.mozfiles.com/files/1042016/67515744641.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6150/1334/files/kawolitumuzil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9327/1745/files/fayetteville_public_library_phone_number.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43FE 5120 bytes
SHA-256: c18c14155fff7a35b6d036fd66b12182af3e4e25a5ddacc4328644b1dd2620fb
font_01_sfnt_off0000555a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x555A 10096 bytes
SHA-256: 5e59e61fbbc05660e31f2ec449e190507fa4d0b35066923241a0ccef39caf273
font_02_sfnt_off000077d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D4 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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