Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8dbe450a12d05cd…

MALICIOUS

PDF

82.6 KB Created: 2021-04-02 01:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 848ee49e0a22fd34e4c08866bec3f1ca SHA-1: 9b1ede698f999a6389f5c0e7e613c82d4624de7e SHA-256: f8dbe450a12d05cd0a0e18cf2bc97cb1e42c88a126b7abb4360103aa61c69d13
206 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run lure and a clipboard-command (paste-and-run) lure. 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 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://xezojetit.ru/strik?utm_term=windows+7+secret+codes PDF link annotation
    • https://wesonibisizigoj.weebly.com/uploads/1/3/0/9/130969529/redoponekogolopolija.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/dubofut_nokera_refugi.pdfIn PDF document text
    • http://jemulobapamiwu.mywebcommunity.org/11625458613.pdfIn PDF document text
    • https://nokafixawawi.weebly.com/uploads/1/3/1/6/131606940/f1e2cf2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_60342f483aa81.pdfIn PDF document text
    • http://ourfanz.com/rosileganexobape20eu3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_5fd86677e4322.pdfIn PDF document text
    • http://kofojoxake.mygamesonline.org/cordova_in_app_browser_open.pdfIn PDF document text
    • https://sonalopuxarore.weebly.com/uploads/1/3/4/3/134310538/4547408.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369909/normal_5ff08db32249e.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/download_annotator_mega.pdfIn PDF document text
    • http://pro-komp-master.website/audacity_record_computer_audio_windows_109lr0h.pdfIn PDF document text
    • http://linunewilut.mywebcommunity.org/68706323767.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/79131884598.pdfIn PDF document text
    • http://trycabinets.xyz/whats_better_12v_or_20v_drillvtjds.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/final_fantasy_7_complete_walkthrough.pdfIn PDF document text
    • http://bapulesaj.mygamesonline.org/rifisidog.pdfIn PDF document text
    • http://jaxifas.getenjoyment.net/23170966938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394073/normal_6040328bbec31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xowilewegiwo.myartsonline.com/plasma_technology_for_wastewater_treatment.pdfIn PDF document text
    • http://nijarigu.onlinewebshop.net/72838222309.pdfIn PDF document text
    • http://kugukokoner.myartsonline.com/dididazerato.pdfIn PDF document text
    • http://wivaxodi.onlinewebshop.net/97513211395.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/what_is_top_down_and_bottom_up_approach_in_software_design.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_off000100f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F1 4876 bytes
SHA-256: 83d637171e362f6fdc1e1bf49936f2351aff01d5fde476836ddd6ecb2d92dced
font_01_sfnt_off000111b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B7 12148 bytes
SHA-256: a90ac95eed401b2d71c47acadd001e194c4023aa459312a6c7732b994461121a