Malicious PDF — malware analysis report

Static analysis result for SHA-256 c843c1f5f0f5af5f…

MALICIOUS

PDF

75.6 KB Created: 2021-03-01 23:05:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: a98b07631a3cdd4827b92208c5a650a1 SHA-1: 2dd4e05851b31c9870c6cb3943d4bfcdf0986d1f SHA-256: c843c1f5f0f5af5fb727eb9a12c4f060bd01d1f96fa89298871dce5e7f10daf7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to obscure malicious links within a large number of seemingly benign ones. The primary malicious URL identified is https://lozipotod.ru/award?keyword=why+is+my+uconnect+not+working, which is likely used to deliver a phishing page or a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://lozipotod.ru/award?keyword=why+is+my+uconnect+not+working PDF link annotation
    • https://cdn.sqhk.co/loziromegon/ckha0jc/epic_cube_dashboard.pdfIn PDF document text
    • https://zewogamiwivu.weebly.com/uploads/1/3/4/3/134313422/5283e11f29fd691.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/reiki_symbols_wall_art.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391319/normal_601fb39d6b9c9.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/yIgjQDE/gevisuf.pdfIn PDF document text
    • https://mewatejo.weebly.com/uploads/1/3/5/3/135322937/javamafutasorerupop.pdfIn PDF document text
    • https://woxigixekamut.weebly.com/uploads/1/3/0/7/130739530/9324791.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372399/normal_5fe21f4b56091.pdfIn PDF document text
    • https://cdn.sqhk.co/tolademapati/WEAwWih/age_of_ottoman_apk_mod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvojidepezepag.epizy.com/android_phone_messages_on_ipad.pdfIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/imax_b6ac_dual_power_manual_en_espaol.pdfIn PDF document text
    • http://musizaxodolof.epizy.com/tugilajatigowefijux.pdfIn PDF document text
    • http://liwujurepawoweb.rf.gd/the_maze_runner_2_full_movie_download_in_hindi_filmygod.pdfIn PDF document text
    • http://gogewarixisude.epizy.com/wunuvafijituwujaziviboze.pdfIn PDF document text
    • http://xowofalofuzuxis.epizy.com/xirenufajuvalivoxe.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_off0000e90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 5240 bytes
SHA-256: 87a1298166edc23c5abc6f2086bcc25135debe8463424a2e42a6cb645c1dd586
font_01_sfnt_off0000fada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADA 10848 bytes
SHA-256: 1664e3ffe91956c3800de76fca37e2f66a42f5aed05562ca8e42d72b5a8db970

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