Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e5280299f5b79f…

MALICIOUS

PDF

74.1 KB Created: 2021-09-21 07:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2ed9d571d5e66b4ef0712ad9b4439260 SHA-1: e0fc35fede525ca388a51743f6df3b1ca703565d SHA-256: a7e5280299f5b79fe0fbece63d98dec778bf8887121add7042a35e970a463160
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://coretry.ru/uplcv?utm_term=damon+ps2+pro+pc PDF link annotation
    • http://detaycopymatbaa.com/userfiles/file/69937930700.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5662599432.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/jalasunevun.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/nawogunotufekanisa.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/gojaxikotujotufana.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/66406030847.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/36882378207.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210920114838_1034198622.pdfIn PDF document text
    • http://nobody-films.com/bpms/includes/fckeditor_uploads/userfiles/file/debadakemoxiniv.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/iu6d1r0cjubc16doet25mrk1rg/gifexekewekib.pdfIn PDF document text
    • https://andana.us/files/files/9856602664.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/jagixosaxumuwotokujon.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/tewinevuxofiruravigezela.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/rosupelolosuwu.pdfIn PDF document text
    • http://aprt1day.ru/file/87685577491.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/161315cf4acdd4---xaporifirizox.pdfIn PDF document text
    • http://kidzcastleschool.com/singhania/downloads/file/fuxomuxevivinidefagiro.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/14601143923.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/72554758526.pdfIn PDF document text
    • https://phm.vn/upload/files/5492787110.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/12398529986.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/kuguduxiparomezura.pdfIn PDF document text
    • http://studio70.eu/userfiles/files/batedigepenemevi.pdfIn PDF document text
    • http://zamgph.com/uploads/file/050728162894.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/68596815551.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_off0000bd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD7F 17828 bytes
SHA-256: 4200c0d5735a7d8d3e126524d21bd4a8bee65a484d4d023d325814f81f24d337
font_01_sfnt_off0000ebc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC7 10288 bytes
SHA-256: 9f33bce9b65c8ef52c6d79f23aeea6b6d7792cce540ac55d51b9809473710f40
font_02_sfnt_off000102f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1