Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e95904bbf49145d…

MALICIOUS

PDF

92.9 KB Created: 2021-08-02 22:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d0e78f6b688fc349a911601f887d105d SHA-1: 70a2cdd6dd81e8d5b65e8349318115416202d59f SHA-256: 1e95904bbf49145dc40cdd6b2b688fa744171bc43f63fa74aaae8a676915aa6b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a malicious document, including multiple heuristic firings related to URL link farms and compromised CMS uploads. The presence of numerous external links, many pointing to potentially compromised WordPress sites or disposable hosting, suggests an attempt to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the overall structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://wastran.ru/uplcv?utm_term=how+to+bypass+the+lock+on+a+whirlpool+washer PDF link annotation
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/walulopedobiwub.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-4/20210504101309357229.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/d33df9301a107993fe1b378281055e69/milowuxixunexu.pdfIn PDF document text
    • http://ambulatorioveterinariopisillibertozzi.eu/userfiles/files/bexojekiwozilumopawewak.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/33bbb78086f4247700b1a01ccf1ede73/48278186137.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/letomiwipozexop.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c6ce8a4d2---wurugo.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/77920836684.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/38645339629.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f9c76380c---vuxineto.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92e8d9360f---40956725043.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbcced6f49---7717445655.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/fifavobuvagaruxegemerul.pdfIn PDF document text
    • http://chinalabware.net/d/files/zozupigazasigiwuxoni.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/vulunud.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/vasixefidi.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/jepuretipubalap.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b63d2d368---71069043261.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/45877984808.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610101d8c5c63---tegolexaditere.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/l63oq7jkp1j07b7vbjc9kqgd9u/xixefupedaxotun.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/tixonenisadusidunavawazuw.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_off0001075c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075C 17028 bytes
SHA-256: 27672ba25684cb105a4a217f7e0b63f5ef5f4b8c3e33290f5c79db907ef1ff8f
font_01_sfnt_off000133aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133AA 10892 bytes
SHA-256: 7ea6f72cae5b644015cfe7a9e24ab55ad9c18a0981fd997b83672dcbe4534cda
font_02_sfnt_off00014ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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