Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1f9f56dd0f3ebe…

MALICIOUS

PDF

84.8 KB Created: 2021-09-23 21:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 263950035b485f5917de557f196a69ec SHA-1: 35f2c19d734deee65aaf3b773d063b312796f051 SHA-256: 9b1f9f56dd0f3ebe159a62a58e83707f96034f3c4c3512dd7469324fd51a5768
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to form a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://wastran.ru/uplcv?utm_term=can+you+cast+phone+to+ps4 PDF link annotation
    • https://alihuata.com/userfiles/file/xovupogakunepazugixu.pdfIn PDF document text
    • https://promaxsuspension.com/csmimage/file/vomezanikinamopogujufubo.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/11458762572.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/fivalixizulusuzekamekaviv.pdfIn PDF document text
    • http://195exim.com/datas/files/91096077763.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/tagetoberimorutudusokap.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/kiluxebaxokomi.pdfIn PDF document text
    • http://baozhaopharma.com/upload/files/wofanawuxapenimuwo.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/53569296542.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/7420353949.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/nipuk.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/e09bdc86a93121b1091a71b4cea2313d/94119566671.pdfIn PDF document text
    • https://nepalonlineexam.tisaracademy.com/userfiles/files/fibawasiwosoxonija.pdfIn PDF document text
    • http://12shio5.com/contents/files/sipazaboliwawedilokomur.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/4403788844.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210920133208.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2f786a966---46342077947.pdfIn PDF document text
    • https://badrivishal.com/media/4266365482.pdfIn PDF document text
    • https://granitabrasive.hu/editor_up/wetovuv.pdfIn PDF document text
    • https://jatransfer.com/userfiles/file/zozut.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/12427589721.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/fajabejat.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/selibagerutosupakipasijav.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_off0000e89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89F 17356 bytes
SHA-256: e70bc83409917388157215f0bfee4069fc2cbd8c0ecb21215492934f173fcc3b
font_01_sfnt_off000115c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C3 10556 bytes
SHA-256: 3746049f545a6b6d91b5dca36f76530d52199f398b8dccae37724d6032339234
font_02_sfnt_off00012df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1