Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd0298acefcc6a3…

MALICIOUS

PDF

72.9 KB Created: 2021-09-20 17:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a014e9125096d2e2e2ba614fecb4ca7b SHA-1: 816851efe289961f80c98763bff7f055c9685fd6 SHA-256: 9fd0298acefcc6a3f504e437eb3333d83cc157999e0482451f19181eff62ac53
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/wugalofop.pdf In PDF document text
    • https://chupwo.com/editor_upload/file/kidoleworurowuxutilufubul.pdfIn PDF document text
    • http://iknow.pl/files/file/64680061415.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/nobalakizerolekabopafeg.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/49591399960.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/87782936385.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/86793582622.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/xixozavunevezerapup.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/kenabotuvunupaxejuvawepi.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16135267119035---kuxetexefivegison.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/bowulabifuwovawob.pdfIn PDF document text
    • http://glassick.com/userfiles/file/35880579617.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161327760dba2b---matedesoritinip.pdfIn PDF document text
    • https://mimpidia.com/contents/files/sevixelakolifarupeb.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/14547947297.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/dajewedagi.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/zibef.pdfIn PDF document text
    • http://huynhgiabaohotel.com/uploads/FCK/file/mufibajodoxagikusuzipapam.pdfIn PDF document text
    • https://ppntassone.it/dati/upload/file/xanunopabutewijemuxi.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/madukiwomo.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/21109342031.pdfIn PDF document text
    • http://poultech.net/d/files/39382107924.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/legezokoxarejugibixa.pdfIn PDF document text
    • http://theurbanbazzaar.com/userfiles/file/mowolovukugexirape.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/lisefegijukelefeme.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/pobowivubifajikavi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=klondike+adventures+modPDF 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_off0000b80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB80B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD022 10656 bytes
SHA-256: 3e43d0295ab9b4cca8897c2cf335e330ee4b257097829fbc4ae5a3365d573fe8
font_02_sfnt_off0000e883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE883 17728 bytes
SHA-256: 456fb9f3f4da96b0fe0231fdb9fc9fef31c48ec9470f98744d44d3b15a1ce36e