Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fbc420ed00ce76e…

MALICIOUS

PDF

99.4 KB Created: 2021-04-02 05:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 87f4c71212771ed3ac515853feb3b67e SHA-1: 595768ac91cff62fadf53b5df56f8ae6b4c5f24d SHA-256: 3fbc420ed00ce76edcaaf7840dddbfae9f4035f6a6b3f42cf86e31ffe466850b
306 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, attempting to trick the user into executing commands via clipboard manipulation. The presence of multiple external links, including one pointing to 'soxebez.ru', suggests an attempt to redirect the user to malicious content or download a payload. The document's content and heuristics indicate a high likelihood of it being used to deliver malware, possibly through a command execution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://soxebez.ru/strik?utm_term=nmap+cheat+sheet+git PDF link annotation
    • https://cdn.sqhk.co/xejexeremiso/ehchdOz/stryd_force_multiplayer_fps_games.pdfIn PDF document text
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/f4e124d828.pdfIn PDF document text
    • http://covidcapsule.world/plantar_fasciitis_therapy_wrap_heel_arch_support9lpjv.pdfIn PDF document text
    • http://vadememejunozax.iblogger.org/in_the_heights_full_musical_original_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/fbhem2x/best_photo_editor_for_mac_free_download.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/i0i1bWW/gokuxenaguzanaxexu.pdfIn PDF document text
    • http://limecash.xyz/68902387894jw4ru.pdfIn PDF document text
    • https://generixa.weebly.com/uploads/1/3/5/3/135350481/5238535.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/gjGBZyn/the_royal_affairs_game_hack.pdfIn PDF document text
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/2d76271454772d1.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/iiSfTha/pirokawijijixefitoxude.pdfIn PDF document text
    • https://wunepilupizuxo.weebly.com/uploads/1/3/1/8/131857535/7759168.pdfIn PDF document text
    • https://kiwaluraxipexe.weebly.com/uploads/1/3/5/3/135326690/2ee8afb55.pdfIn PDF document text
    • http://erkutungotu.com/kagimiyuqt8.pdfIn PDF document text
    • http://eurofamily.pro/how_to_fold_up_a_total_gym_supra_proz7ne1.pdfIn PDF document text
    • http:////?file=../../../etc/passwd/linux-privesc/cc-In 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://jafimelivif.rf.gd/police_report_toronto.pdfIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_790a942e9ca144e78eb052a7e65ece47.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gofiguj/oxford_mathematics_book_for_class_7.pdfIn PDF document text
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_26a25be77b054a64894f4a81ac6702e7.pdf?index=trueIn PDF document text
    • https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_3444de701f5a41cb9438945f96dab124.pdf?index=trueIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_16321b3b2edf4cd6b8ecef879238564d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gedexim/introduction_to_sociology_by_john_j_macionis_10th_edition_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F2 4760 bytes
SHA-256: 048246f2e58e572fd109e5e80a2f78033fd0e5458355d6db4458ca377a56d7d3
font_01_sfnt_off00013226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13226 12448 bytes
SHA-256: faa388eb88c702755a4eb19f09a902e8c188057532dfe66e9303613fa2183dd7
font_02_sfnt_off00015ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CCB 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_03_sfnt_off000171f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171F8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378