Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aaaf6e684f2f2ff…

MALICIOUS

PDF

81.0 KB Created: 2021-09-16 08:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 65a1490c5c066ef9ff983d994f8553c1 SHA-1: 984dc0f608fc3785d0f82d9b028f5369b64d42c1 SHA-256: 4aaaf6e684f2f2ff65a7c1b29706dd6b359b8f8d83adc80c31b8efb274c24704
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, containing numerous embedded URLs. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of these URLs leading to malicious content or phishing sites. The presence of embedded URLs suggests an attempt to redirect the user to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://philabc.ru/uplcv?utm_term=9th+physics+pdf PDF link annotation
    • http://majortaylorride.info/images/uploaded/file/89642975892.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/5e810382dd071e96a84fa900d65fbf4e/54269047751.pdfIn PDF document text
    • https://officialbacknumber.com/editor_up/fifevujigu.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-09-08/images/files/fovun.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/97542395227.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/mufepebuperigisoviwese.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/timejemikapotelurirere.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/xeberediko.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/45508054520.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/domosikubanabawiwanalu.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/xoguvi.pdfIn PDF document text
    • http://kkagro.com/media/images/upload/file/79522999352.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/14ac84587a6b3d11c3a04b7c3d0981da/39988133474.pdfIn PDF document text
    • http://alicantea.centralcms.cloud/galeria/files/65471120379.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/siwenonewodowodiwatazul.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/40685272552.pdfIn PDF document text
    • http://thsport.dk/userfiles/file/75539546283.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/nifatipewugogirivudimodem.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/raxezevono.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/15540162992.pdfIn PDF document text
    • http://greenglobepms.com/uploads/karujunomob.pdfIn PDF document text
    • http://balalajka.nu/media/zegutigizitugejudelopo.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_off0000d98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98E 10240 bytes
SHA-256: f182ed83724375db906ab7fd2eca4fbe0ac080c091c489ceee51ef81380ea612
font_01_sfnt_off0000f0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B8 17864 bytes
SHA-256: c4159eea1616c8f8434a947ff7cdf23c30090f25b6602ae2c1485e27668d6747
font_02_sfnt_off00011f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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