Malicious PDF — malware analysis report

Static analysis result for SHA-256 9010b0d994f99b33…

MALICIOUS

PDF

76.0 KB Created: 2021-09-26 20:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d802b601b9e08e20b1e9219ec1162636 SHA-1: 045f7aefcafd9e851a283e02ec65679e4c8226da SHA-256: 9010b0d994f99b33db69903b9ca47789525ecce52694bc73c3ce80c9e2cef252
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and the link farm structure strongly suggest the PDF is intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://swotaweb.com/img/upload/file/zolurajupagofaweji.pdf In PDF document text
    • http://0975811252cool.linker.tw/files/ravijusamitoviloroku.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/27006886719.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/nogigijazif.pdfIn PDF document text
    • http://przystaneknida.pl/data/aktualnosci_imgs/file/59445180005.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/46932600072.pdfIn PDF document text
    • https://trainova.com/userfiles/file/48219763546.pdfIn PDF document text
    • https://viscom.bg/uploads/wysiwyg/files/39758178830.pdfIn PDF document text
    • https://ra7a7p-h3ba7.com/contents/files/nufizomesezeduxuwotos.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/rudawobiwarajime.pdfIn PDF document text
    • https://denis-lefebvre-services.com/fichiers/file/80038892078.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/tipitorejorelazodavawuge.pdfIn PDF document text
    • http://sciattella.net/images/file/merezelapegup.pdfIn PDF document text
    • https://thieumaunao.vn/workspace/develop/uploads/ck_upload/files/74141154067.pdfIn PDF document text
    • http://homeopathyhk.com/files/jusowotufisotenixivoz.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/geralaporix.pdfIn PDF document text
    • http://cgemfoco.com.br/ckfinder/userfiles/files/67939737431.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/45808941476.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/kerilowanuxaxo.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/80974957610.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/forerodejakawe.pdfIn PDF document text
    • http://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/16241964784.pdfIn PDF document text
    • http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/labasuzotej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=fifty+shades+of+grey+movie+ytsPDF 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_off0000bff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD807 10808 bytes
SHA-256: c641e5b572319026d27dffa8d2b9eefab4af904a4fc1825cb329a6361a1bd70e
font_02_sfnt_off0000f0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C4 18468 bytes
SHA-256: 7ab6e96b7bd98d3a527439bbca5106bc6f9e6424969e81b300ef67862202697e

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