Malicious PDF — malware analysis report

Static analysis result for SHA-256 acab0ffe68b235ed…

MALICIOUS

PDF

78.9 KB Created: 2021-09-10 23:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5e30a66a73a3df903d9a7451015ccdfb SHA-1: 8ad8493a50c738a5eaadfe469b67c620d6f8ce4c SHA-256: acab0ffe68b235ed35f41d492817474d2196501cc818e7936f83c41948de0fce
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous disposable domains, likely to host further malicious content or phishing pages. The presence of multiple unknown URLs suggests a broad distribution or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://sosnovgeo.ru/userfiles/file/gevosafevazotozo.pdf In PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/tifijewum.pdfIn PDF document text
    • http://huyminhplastic.com/upload/files/94372904524.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/32559674099.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/32490585160.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/80769582670.pdfIn PDF document text
    • http://chineseclothingonline.net/File/woninewasafizelejanifofo.pdfIn PDF document text
    • https://socardan.com/userfiles/files/menizim.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/kewifufusivolonud.pdfIn PDF document text
    • http://infiniti.e-library.tw/uploads/files/betamoja.pdfIn PDF document text
    • http://as-eng.biz/userfiles/file/51588901682.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/kosup.pdfIn PDF document text
    • https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/88458792161.pdfIn PDF document text
    • http://premiumdrinks.eu/userfiles/tikijiluxi.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/54386317389.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210904152339.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/55209320824.pdfIn PDF document text
    • http://stilistspb.online/public/files/uploads/files/51515750228.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/butotasedetisawowegipuwal.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/pobovitovatiz.pdfIn PDF document text
    • http://hijoin.hu/editor_up/fixetekabu.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/c3db9008a58e30f8bd01c403ebf9ccf1/99932207602.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161307eab1a111---vukelamulizeloroba.pdfIn PDF document text
    • http://grasslandtj.com/upload/files/5285268913.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=wallpaper+ka+appPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB65 9748 bytes
SHA-256: 137a0d126280973df0c5c86e690a2048dbbe1915ad316581bf8c9a66db20db76
font_02_sfnt_off000100cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CD 17468 bytes
SHA-256: 26080998e117f67ccdee20759a0deb5a22f59c4881cb85d608dad53e7a8a353e

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