Malicious PDF — malware analysis report

Static analysis result for SHA-256 698be1b4c282c728…

MALICIOUS

PDF

78.7 KB Created: 2021-09-20 19:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f74ea952bde9faddb7f00eec2552f04b SHA-1: 9ed0a0e6fc09d1589f0cdf784a758c94afa6d24d SHA-256: 698be1b4c282c728e2baec51caca61f13e8a9731e111d066ce271615cc6ff1ba
126 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with a lure to trick users into visiting potentially harmful websites.

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 https://nomylo.ru/uplcv?utm_term=pdf+of+science+class+9 PDF link annotation
    • http://ghettaetamionarchitetti.it/userfiles/files/fufalag.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/27521392628.pdfIn PDF document text
    • https://073741256.com/uploads/files/202109191656298818.pdfIn PDF document text
    • https://commonlawhouse.in/userfiles/file/17467774968.pdfIn PDF document text
    • http://cserepakcio.hu/xdata/file/datejanidir.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210915160614.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/vaken.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/38769341455.pdfIn PDF document text
    • https://www.ftha.org/admin/ckfinder/userfiles/files/suzawamadipodewigogow.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/movipewisut.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/nalokeromimowipisade.pdfIn PDF document text
    • http://net-marketing.hu/images/files/fapuxu.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/sudakirigerefopu.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/56235623037.pdfIn PDF document text
    • https://quangcaonoithatgiahung.com/admin/webroot/upload/image/files/vavapovujodefikidil.pdfIn PDF document text
    • http://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/19007815257.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/nuwanafixax.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/4e5d24b30a54d51e61a88b56e50710bc/10986126345.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f7479a4bc---99458592297.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/suxerikosesipipixogilane.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/puzijubusobividalu.pdfIn PDF document text
    • http://dongduong.net/Images_upload/files/vekowokibamoxuwuxi.pdfIn PDF document text
    • http://noclegsosnowiec.pl/eurostyl/photos/file/1465275883.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/bugigenopowi.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_off0000cdbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBD 10440 bytes
SHA-256: a8c2b2bc09fb650411c65074369ae106a2fad025fb3ea0edfa82278bc7eaa90e
font_01_sfnt_off0000e58b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9D 18356 bytes
SHA-256: 28f7b1cd644f6ae17234bb8907c69394ac958e2fc596efa798449b75e07b385e

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