Malicious PDF — malware analysis report

Static analysis result for SHA-256 147ef44b69481a13…

MALICIOUS

PDF

88.0 KB Created: 2021-09-18 11:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 03c1b13337b77677ef89a79f9d0d6390 SHA-1: 4d90c07c32005a2fb393d2b1d0c9880477e32408 SHA-256: 147ef44b69481a13e44dde8d2628ef7a026bb32c23d8cd6624bbc259966edae7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or redirecting users to malicious sites. The embedded URLs further support this, pointing to external resources that likely host malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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 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://synerhu.ru/uplcv?utm_term=read+black+obsidian+online+free+victoria PDF link annotation
    • http://lixupeng.com/uploads/files/67474446719.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/jupidif.pdfIn PDF document text
    • http://susasoft.com/upload/userfiles/files/ridujezameva.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/xigujuwikimalemuz.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/vavutisidiwozagenulezepo.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210917_D2C35FC4473CAB71.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/35332421091.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/jujixidawoduruvolabateku.pdfIn PDF document text
    • http://islenapuntos.com/campannas/file/29670682653.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161440dd6105b1---27018372786.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/binixisezovim.pdfIn PDF document text
    • http://soncongnghiepjotun.com/media/ftp/file/sexopisesego.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/38781413928.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/fatinejeju.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/13482894766.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/galovuriwijanono.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/gadefegim.pdfIn PDF document text
    • https://asmitahrgroup.com/ckfinder/userfiles/files/wutigow.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/29323909790.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141748107820---sirebokevigaxuwamitomu.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/lokagibuxevusixowumovu.pdfIn PDF document text
    • http://jawarakreasi.com/file/risowipep.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/sexijuzi.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/91083086443.pdfIn PDF document text
    • http://www.sushmitamukherjee.com/fckimages/file/jodorikudijuni.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://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_off0000f08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08C 10812 bytes
SHA-256: 20790459b3bdeadf880a10ed79bc119b33dc84de80017b585869dcb325eb96c2
font_01_sfnt_off00010993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10993 18676 bytes
SHA-256: f0daeae72f1211af670927405caa6b5ba1cc1cb96e1a5c9947f80d66818e10e8
font_02_sfnt_off000139db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1