Malicious PDF — malware analysis report

Static analysis result for SHA-256 0180ec823109ee34…

MALICIOUS

PDF

81.6 KB Created: 2021-09-13 21:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 50efd7b093ff145eaf501282b6194b98 SHA-1: afdf94d029fdd742c71484783a45f43312f397b5 SHA-256: 0180ec823109ee344d4883c8addad2669399ddd12a03f194d779701812dbbd68
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, with a primary external URI pointing to 'https://inwebjor.ru/uplcv?utm_term=txd+tool+app'. This pattern is consistent with phishing or malware distribution campaigns, where the document acts as an initial lure to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://inwebjor.ru/uplcv?utm_term=txd+tool+app PDF link annotation
    • http://ssatripoli.org/userfiles/file/rukizubajekimo.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/vemolam.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/vowegexoresugatevaxonon.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/tozurotoxinaxovubifadilaw.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/41991588558.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/mosovugulul.pdfIn PDF document text
    • http://3gr-group-com.gbintl.com/ci/userfiles/files/lusofebejifujufedig.pdfIn PDF document text
    • https://afritransport.com/app/webroot/files/file/karovujubuwokolibijipu.pdfIn PDF document text
    • http://khacvietlaser.vn/public/images_news/files/reviraximuruduv.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/mukudaromorose.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/farapixewatoma.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/43853425444.pdfIn PDF document text
    • http://hutnia.pl/userfiles/file/49498710545.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/dusibek.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/fapopezudo.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ka1q07veeugj68896kbvfb8jt4/54739615516.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-9-8/20210908024725510131.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/61047794399.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/79449372294.pdfIn PDF document text
    • http://wasserburg.pl/userfiles/file/13804991538.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/3506692089.pdfIn PDF document text
    • http://konyanincigkoftecisi.com/userfiles/file/76221735155.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/folevexegenizumuxunipop.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/bomikufewumodusoge.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_off0000ddbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBC 17304 bytes
SHA-256: ebd741c928959da2c50f3265d52987124709ab592348a1f065e9e61b8bd1d384
font_01_sfnt_off00010a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1B 9856 bytes
SHA-256: 25ed1fba6adb54db509a11715126893b5253e8f5219544f218ac3bb8123c8267
font_02_sfnt_off00011fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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