Malicious PDF — malware analysis report

Static analysis result for SHA-256 358516192413baf9…

MALICIOUS

PDF

80.8 KB Created: 2021-04-13 02:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f5aa3dd4880126ef8411c450b0950aae SHA-1: f47f1daf43e2d7e24542311a64cb38cd38897e74 SHA-256: 358516192413baf9a5e5545f178fcebe03052c27824d58af715509d4d098b263
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs and a heuristic firing for a 'link farm on disposable hosting', indicating a strong intent to redirect users to malicious content. The presence of a 'download button' heuristic further supports a social engineering attack. The ML classifier strongly flagged this PDF as malicious, suggesting it's designed to facilitate the download and execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=power+electronics+by+bakshi+pdf+free+download PDF link annotation
    • http://meetsol.xyz/city_of_fallen_angels_book_coolw4feh.pdfIn PDF document text
    • http://tlgfree.xyz/tifomeworutj064m.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/jokufovesi8rceg.pdfIn PDF document text
    • http://vertigoa.online/50627927389c6e76.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/MghbHig/kudaxexifotalurikatejizo.pdfIn PDF document text
    • https://senamevab.weebly.com/uploads/1/3/4/6/134689233/guwukotugik.pdfIn PDF document text
    • http://jakesubinosol.scienceontheweb.net/vegosakofo.pdfIn PDF document text
    • http://silewugebed.scienceontheweb.net/addition_brche_aufgaben.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/hjhchhH/best_app_to_make_your_own_music_video.pdfIn PDF document text
    • http://mokenolovulonom.medianewsonline.com/l_apiculture_pour_les_nuls.pdfIn PDF document text
    • https://ditomivowulute.weebly.com/uploads/1/3/4/6/134679561/tinirakelawijip_xigosaj_napariwud.pdfIn PDF document text
    • https://jibowosiz.weebly.com/uploads/1/3/4/6/134632869/4537726.pdfIn PDF document text
    • https://cdn.sqhk.co/sategexarom/0ifihjd/auto_dealership_tycoon_apk_data.pdfIn PDF document text
    • http://my-favshopc.online/lolinedefozoe44es.pdfIn PDF document text
    • https://pifunugujo.weebly.com/uploads/1/3/4/4/134455612/xijafufawazab.pdfIn PDF document text
    • http://galabogenezoso.getenjoyment.net/60078457249.pdfIn PDF document text
    • https://bozomobumaxal.weebly.com/uploads/1/3/4/8/134873382/445a87e76b1c.pdfIn PDF document text
    • https://masarifixi.weebly.com/uploads/1/3/4/4/134486171/baa971590c739.pdfIn PDF document text
    • https://kuvezuwuziteb.weebly.com/uploads/1/3/4/3/134388010/6532631.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
    • 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_off0000ef63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF63 5428 bytes
SHA-256: b26ac4bb77dbd7f4eb995c65c0a21a9d3b0600aff7e7060b8f736be23d653128
font_01_sfnt_off000101d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D9 10512 bytes
SHA-256: 1e0868ebf2c4b4c0e80df68b9fbc0a89bd4b7ddc2a9fc8be6ad6c52e90161ed2
font_02_sfnt_off000125a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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