Malicious PDF — malware analysis report

Static analysis result for SHA-256 eafbbc626478aa28…

MALICIOUS

PDF

75.0 KB Created: 2021-05-11 02:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d0f4ee05398bb1904b4619cc35b078a8 SHA-1: 2ff53bd85faa56dbbcb6428e0f709e9942636829 SHA-256: eafbbc626478aa287876be4356e6f4588ca3ae22a3ffc60086a50a4fc87058e8
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The presence of numerous external URIs and the 'link farm' heuristic suggest it's designed to redirect users to potentially harmful websites. The 'LOLBin Run Command' heuristic further indicates attempts to execute commands, likely to download and run further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://vilenefex.ru/strik?utm_term=linux+system+programming+tutorial PDF link annotation
    • https://cdn.sqhk.co/jibezilesu/gY4KDic/famew.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CBzRJjj/4831920716.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/e3Ahhha/moduwiputupebosujod.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/iEbG5hf/marketing_mix_elements_for_services.pdfIn PDF document text
    • https://cdn.sqhk.co/mitukutowum/Xgdxhcv/91509646553.pdfIn PDF document text
    • https://cdn.sqhk.co/fodumisux/LNFjege/spiral_curl_perm_before_and_after.pdfIn PDF document text
    • http://xufonewujisos.scienceontheweb.net/63102037473.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/gepeduvo/cT3ibFF/hockey_shooting_tips_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/kosadara/hegjgeq/second_hand_clothing_sites_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/jelasusoved/dGy4ygf/vuraxelizibi.pdfIn PDF document text
    • http://zitugaxusi.mygamesonline.org/sunilalewezolirovudiwovik.pdfIn PDF document text
    • http://xawixojupaxixan.onlineIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nisetekotixob.myartsonline.com/wodilasarineraxobini.pdfIn PDF document text
    • http://pigutun.myartsonline.com/catia_v6_basic_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75becd9d-39cf-4420-bd94-a400f00ab101/73212020897.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/fabituzapopojirifezokejal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cacd648e-782d-4958-83c9-ebd4e9a5b07d/mamipabuju.pdfIn PDF document text
    • http://lopejad.epizy.com/at_t_report_outage_internet.pdfIn PDF document text
    • http://xawixojupaxixan.onlinewebshop.net/beauty_and_the_beast_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/formao_barbeiro_aveiro.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/akkada_chinnavada_naa_songs.pdfIn PDF document text
    • http://lulevewutowa.epizy.com/melting_ice_sheets_and_glaciers.pdfIn PDF document text
    • http://bixoravu.epizy.com/picsart_mod_apk_latest_version_apkpure.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_off0000e561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE561 5248 bytes
SHA-256: 79f61bfb3960ba1e219a66894538a36394bb5ffc2f1cb32c2aa4d3ed7c9a3a60
font_01_sfnt_off0000f734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF734 11796 bytes
SHA-256: 83f9266180febd794e931a79808af184cf8b3ff889482ea2a9d8286b69b469e4