Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1509e9fddf5c08…

MALICIOUS

PDF

87.0 KB Created: 2021-09-20 19:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c3d1d7a9936c3ea00480cf4e2c7c0e1d SHA-1: 1bc9e19a3721a4606d64c4303e46600284e8907b SHA-256: 2f1509e9fddf5c08999a53373971579e21fc303267efe677626c7f5fd05d394b
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous external URIs and is described as a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ketchas.ru/uplcv?utm_term=android+devices+market+share PDF link annotation
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/69834789173.pdfIn PDF document text
    • http://pibar.tw/uploads/files/202109050711466367.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/zafovututugasutufexakuxax.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/8458073229.pdfIn PDF document text
    • http://stickers-moins-cher.com/userfiles/stickers-moins-cher.com/file/gatixezitijut.pdfIn PDF document text
    • http://ancheng-medical.com/uploadfile/files/tulokexobojaloxupexufut.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/jorisifipiruzomixutatizim.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/42381202834.pdfIn PDF document text
    • http://e-sportis.com/images/upload/78592266697.pdfIn PDF document text
    • http://reliancefla.com/admin/images/file/46471477478.pdfIn PDF document text
    • http://yuqiaohome.com/uploads/files/202109010450565165.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/36839298652.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/nuxowubufedusi.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e3061aca0---lesilawezagegud.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/zesavuragafeme.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/5e1d44023a802dbc5b96c1b144c99458/84899939911.pdfIn PDF document text
    • http://vitrine-prof.com/files/pipemaxawawu.pdfIn PDF document text
    • http://3sdent.com/upload/files/lojetufoduwide.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/muxolobujulepo.pdfIn PDF document text
    • http://autolubitel-irk.ru/userfiles/file/vurajevowaverowunafalob.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/fukarenu.pdfIn PDF document text
    • https://profm.hu/files/file/61707458734.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/kegekuziwerelopujunib.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_off0000ee2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 10728 bytes
SHA-256: 87f834def74830df0d3e496a194a0616a9c112f59733e61dbcf79a300fdb4bdd
font_01_sfnt_off000106b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC3 18368 bytes
SHA-256: 74401179f4fa76fac271c8bd645b8cbe44c8f51aa9c75bec8a3e2c8a04f4bbd4

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