Malicious PDF — malware analysis report

Static analysis result for SHA-256 7059b21a0c557f85…

MALICIOUS

PDF

70.0 KB Created: 2021-09-13 12:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 59f6c893546640d47b0439cbf89d73f8 SHA-1: bd068ee59b8b0a6c6ebe0eff17d8a10a135723df SHA-256: 7059b21a0c557f8508d6b0a3fc4c893db7e8445e1e9e1d62eb0f0aa7b33e94f1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://rrbrentacars.com/files/others/83474577653.pdf In PDF document text
    • http://ekorepetycje.eu/Upload/file/wonagirogapisepevimiw.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/91972989364.pdfIn PDF document text
    • https://shoppingplanet.cityplanet.ro/ckfinder/userfiles/files/xugebirotabor.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021090513195473499.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613eab12e56ad---kamovokilotizobep.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog/file/42728871951.pdfIn PDF document text
    • http://vdtonline.vn/static/uploads/editor/files/49726385071.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/fevedivelexukajojuwuxo.pdfIn PDF document text
    • http://caramelitos.sk/files/tojeginatenos.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/09/file/202109111053124846.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/13360935380.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/10420646896.pdfIn PDF document text
    • http://kelvista.lt/images/files/sebodasozitinamumeveze.pdfIn PDF document text
    • http://spakimthi.com/upload/files/52337650189.pdfIn PDF document text
    • http://vuonlan.vn/data/upload/files/kixoso.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/29618195450.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/95148542994.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/tugudefire.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/51830125588.pdfIn PDF document text
    • http://104408017.linker.tw/files/zududepirebakumemoduduvoz.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/tilutu.pdfIn PDF document text
    • https://ermolino.mebel18.com/uploads/files/zevipuzewesifa.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/uacs5a336dpgop8ftalb1qgn6f/tuzitawemekujuvef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=donkey+kong+androidPDF 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_off0000b3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BB 10316 bytes
SHA-256: f7d9feafc4376b5a41f3a54c8af583545e2092d557d4d9c65f4932cd5e842a8c
font_01_sfnt_off0000cae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE1 15580 bytes
SHA-256: 7edd3a738b79d681daef8ae0e94074d862ca9ac093a4d921df91ce07a3aa2006
font_02_sfnt_off0000f28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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