Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec13ee0d014c6993…

MALICIOUS

PDF

73.5 KB Created: 2021-02-16 21:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7d9a8be274b0c64b1472bd102b729610 SHA-1: 90c7f1345a9ee5f709d76bc7feb8c25ab5942b06 SHA-256: ec13ee0d014c6993625e238ec76c6712d37f672c90267e039885d5af21b3fcdb
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9998

Heuristics 4

  • 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.
  • 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://leonvi.ru/wix?keyword=coleville+high+school+softball PDF link annotation
    • http://gakebapenabe.iblogger.org/commando_1_full_movie_2013_filmywap.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/e7ic2gd/11396934740.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387698/normal_5fda954d80a57.pdfIn PDF document text
    • https://sibewelile.weebly.com/uploads/1/3/0/8/130815008/lisef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410694/normal_600c8c763b1a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469633/normal_6003d679b56c2.pdfIn PDF document text
    • https://cdn.sqhk.co/menaleratupo/XA2hbja/defozikelimitu.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/6whiZzP/99872786984.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416128/normal_5fe53ebab9ee2.pdfIn PDF document text
    • https://cdn.sqhk.co/rosafipex/jJbyhbG/musibaza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406208/normal_5fc69b1d82422.pdfIn PDF document text
    • https://renezotutumiw.weebly.com/uploads/1/3/5/3/135343322/3804218.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fibotujipisozu.rf.gd/miritavilekabe.pdfIn PDF document text
    • http://pasudef.rf.gd/mandated_reporter_illinois_law.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/local_tour_guide_japan.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/b._ed_form_2018_du.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/bittorrent_free_windows_xp.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/puxesu.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_off0000e405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE405 5152 bytes
SHA-256: f2b464b6f7a02fbd5d07fa8dde1f1dd49822673261985fdcfa736777249ec72e
font_01_sfnt_off0000f59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 10328 bytes
SHA-256: fb0dbf7e120e43153fc77cea3b0547eb289724b44ffbb3205e57868dec7a67cf