Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c115c14b72923e2…

MALICIOUS

PDF

72.4 KB Created: 2021-03-05 00:20:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a98881194fdcbf14a6a8d764c9143002 SHA-1: ac5bd9cbc4bd3b5c7aed19d7023bbac80332eff9 SHA-256: 3c115c14b72923e24de9b7618cfc9d1bf6c2e5e0ae8f5a15c13f1dd82b61d81e
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ponafet.ru/strik?utm_term=how+to+reset+suunto+ambit2 PDF link annotation
    • http://kemutedetabu.scienceontheweb.net/vujokud.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/Y1jfZhb/easy_cnc_projects_to_sell.pdfIn PDF document text
    • http://movizopolu.medianewsonline.com/elan_touchpad_driver_windows_10_toshiba_download.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/allusions_in_romeo_and_juliet_act_4.pdfIn PDF document text
    • http://keniworu.mywebcommunity.org/asus_rt-ac66u_router_problems.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/RjfhdG8/dumevef.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/rajewuwomukake.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/czTWoib/mermaid_princess_adventure_games.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/5idWxiL/minetest_server_github.pdfIn PDF document text
    • https://cdn.sqhk.co/givujelised/HiihK2J/ketagepotofuletozapip.pdfIn PDF document text
    • http://nufivuzelikonax.getenjoyment.net/50766066803.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/cIunjhS/josezo.pdfIn PDF document text
    • https://cdn.sqhk.co/jisogixij/ih9jdG6/dessert_recipes_using_canned_apple_pie_filling.pdfIn PDF document text
    • http://didazema.mypressonline.com/ti-30xs_multiview_calculator_manual.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/how_to_read_values_from_normal_distribution_table.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/what_is_separation_of_powers_in_south_africa.pdfIn PDF document text
    • https://nolipugi.weebly.com/uploads/1/3/4/6/134652161/9287829.pdfIn PDF document text
    • https://tavefagizukog.weebly.com/uploads/1/3/0/7/130775361/591357b1b7032.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wonanikapudidak.atwebpages.com/how_much_does_an_associate_analyst_make.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_off0000e022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE022 5124 bytes
SHA-256: d80f9112f20e5dc0f0eec9ce239babcbdfd5a01e72916c955c87a882a490fdab
font_01_sfnt_off0000f184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF184 10448 bytes
SHA-256: 00f5eb078de62b50c7bd9e8132e4a13733cdd9f8e3d94739e34ebdb781d5f40e

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