Malicious PDF — malware analysis report

Static analysis result for SHA-256 054d18ccc865ead4…

MALICIOUS

PDF

57.1 KB Created: 2021-09-27 12:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a9b800744c7263f8a54893ea9dc871bb SHA-1: 3c6b8bd222fa1c956c68c7009c92ebad453e2f2c SHA-256: 054d18ccc865ead43d31c25e907232848eff47e82bde9249914e79513d0d7c42
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, aiming to trick users into downloading further malicious content. The presence of 'cmd.com' in the document text suggests an attempt to execute commands, likely to facilitate the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7667

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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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 http://laptopplus.be/app/webroot/files/userfiles/files/41755362814.pdf In PDF document text
    • http://qdcmd.com/data/files/sevasiresawun.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210916_593D9A116AE0B0AE.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161319b8a5e2d5---tuvirarusafijulonak.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/74815401673.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/de89ce4526e964f6c2a7b79f7846b0b8/zurobegakexewitizixowi.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/jukisivasunoduz.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/88788516848.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/92331107069.pdfIn PDF document text
    • http://otohyundaidanang.com/uploads/image/files/39195781466.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16148e772843f5---rugojapat.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/puwokas.pdfIn PDF document text
    • https://fpcofmacon.com/nbloom/fckuploads/file/57908716813.pdfIn PDF document text
    • http://rlmlaw.com/images/edit_images/file/galomabitizove.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/32007655188.pdfIn PDF document text
    • http://chieucoingason.vn/files/teziwumukode.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/34711763451.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/627550604.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/mubokabesizejukog.pdfIn PDF document text
    • https://kaparatt.com/images/File/37445273599.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/4875311713.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614b90b673aa6---bifixo.pdfIn PDF document text
    • http://ux-school.ru/files/files/mukuduraxutuzelobuzoxuna.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/gixakujuminex.pdfIn PDF document text
    • http://sumisaedu.com/FiIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=raft+android+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF28 10176 bytes
SHA-256: 5964926f99a1a353a0ac61f9ef67723626c150e8f479448739b442c76949723c
font_01_sfnt_off0000c60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC60F 14772 bytes
SHA-256: 1212f82f057a28817b97b55941bab83bcbfeef01b0bc142d1e9bdc69b0aee6bc