Malicious PDF — malware analysis report

Static analysis result for SHA-256 03baebdc79167306…

MALICIOUS

PDF

82.5 KB Created: 2021-09-15 07:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 206144716455fb77e68a8dd067e414ca SHA-1: 9acecc60da4e9f64a96edac1df9e378326df204c SHA-256: 03baebdc79167306dffd8b4c7ed2f33883d32d68656a38c9819a71bd3ff84db0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to distribute malicious content or phish for information. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://huntic.ru/uplcv?utm_term=indian+idol+singer+sunny+hindustani PDF link annotation
    • https://dalyanestate.com/userfiles/file/gewozikilivoxetugifabupow.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/vabunix.pdfIn PDF document text
    • http://sten.kr/club/data/userfiles/file/20210909043621.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia/files/74787353028.pdfIn PDF document text
    • http://uts.edu.co/portal/app/ckfinder/userfiles/files/bebawinuko.pdfIn PDF document text
    • http://corising.info/sa_upload/userfiles/file/20210913060518.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/m0dgv6kmot4r264qo7knn2up44/luzogenibetidoxa.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/toboponaxudatigepaperoj.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/91322177816.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/61502401284.pdfIn PDF document text
    • https://pmms-online.com/assets/file/zisabejomoxi.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/92321794059.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161416d213447f---7911361743.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/20645784773.pdfIn PDF document text
    • http://balbu.eu/uploads/news/file/dorasowomesowavofu.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c47aec08e2---nixuwijelurototilalok.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/28604894449.pdfIn PDF document text
    • https://chungcungoaigiao.vnpec.xyz/uploads/files/zidal.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/63995740370.pdfIn PDF document text
    • https://tresonance.org/uploadfiles/54737398378.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/kiwonarijege.pdfIn PDF document text
    • http://debten.net/UserFiles/File/mubosez.pdfIn PDF document text
    • http://allier.proximeo.com/ckfinder/userfiles/files/junudomesimofegukod.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/bimom.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/temawoxonuwisugajo.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_off0000daa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA6 19004 bytes
SHA-256: 4c5ab8ae86db7589a183f7ca3d9fecfc5180e8b3ed9c5b3d4fa804cb506718a0
font_01_sfnt_off00010c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C09 10692 bytes
SHA-256: 7dcee9a25d524871851692828fff9aacdc26b7101263e6442e078530ace495fa
font_02_sfnt_off0001244c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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