Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa460d5131effbfa…

MALICIOUS

PDF

72.7 KB Created: 2021-01-19 18:48:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 6c2fa7bd6878a23700cbed9d32019153 SHA-1: 6b9976a8e8bc07d663fbac9ccf15cb9dc60f65b8 SHA-256: fa460d5131effbfa48ac1926682e87a740cf213b1c6acef163345ea2b96ef251
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous links hosted on disposable domains suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/123?utm_term=lord+of+the+flies+reading+guide+questions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407066/normal_5fb601253ee74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389127/normal_6000d00eee573.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/4YjjLg6/89893995878.pdfIn PDF document text
    • https://site-1176697.mozfiles.com/files/1176697/coliform_present_in_water.pdfIn PDF document text
    • https://bipikive.weebly.com/uploads/1/3/4/3/134342269/beriwa.pdfIn PDF document text
    • https://site-1172435.mozfiles.com/files/1172435/rovif.pdfIn PDF document text
    • http://kameregeperiwaz.22web.org/73068182096.pdfIn PDF document text
    • https://site-1178304.mozfiles.com/files/1178304/31776155464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380859/normal_5f99bb6c0d9e4.pdfIn PDF document text
    • https://site-1256634.mozfiles.com/files/1256634/baofeng_bf-_a58_manual_espaol.pdfIn PDF document text
    • https://cdn.sqhk.co/jedetanepiz/8djaOjj/tricky_riddles_with_answers_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/ghggifE/jelimasevosulu.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/OjjVm0U/kaboxiterujup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ferurexage.epizy.com/escardio_guidelines_pacemaker.pdfIn PDF document text
    • http://pulawev.epizy.com/endoscopy_report_writer.pdfIn PDF document text
    • http://potopaf.epizy.com/10091797424.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_off0000e0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BA 5236 bytes
SHA-256: a419971657744924bbc97f72334ce4f73bc5f302861396e3a5191ada3ad8cc42
font_01_sfnt_off0000f27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27F 10224 bytes
SHA-256: f5e00d32412c9cc5f0f166664b9f8c206e12d527ba79ab0ee715c0bdf4472a8d

Open this report in the interactive analyzer, or submit your own file for analysis.