Malicious PDF — malware analysis report

Static analysis result for SHA-256 94dfe5a004fd9494…

MALICIOUS

PDF

80.0 KB Created: 2021-09-07 07:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a56d58cf21edaaeb3c0449106878f4f6 SHA-1: ce4fb0a1bb2cd4a7da2ef1eb7618ba1923513678 SHA-256: 94dfe5a004fd949458e36ec6a240c6d2a13137340c4d812bbfb11f4e434b0d3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous heuristics identified the PDF as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. These links are likely used to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://drafthe.ru/uplcv?utm_term=phrasal+verbs+give+exercises+pdf PDF link annotation
    • http://orgue-chantepie.info/FCKeditor/upload/file/matuxerode.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/63773114755.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/f9bd41f9eadfad46da9460795b6aa330/bodinixefuxanodomojepusin.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mipexati.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/40644779146.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/47852766068.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4048c8e4f---kufix.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/44845432645.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/gagizimipedixesewuwibeba.pdfIn PDF document text
    • https://kompaspt1.com/contents/files/95896758484.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/49314212404.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826d1172d5d---dusasogog.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612683a0a4c1f---wisinujifowudatatitu.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/kuwakegir.pdfIn PDF document text
    • http://xn--d1achljw0b.xn--p1ai/content/upload/komuwajaneba.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/jorakelok.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/86662232425.pdfIn PDF document text
    • http://fkhd.cz/data/img/tifovuxafedodopewoj.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/66d418c765504bfb2d3ff8c3ecb06b84/78412969643.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/vofifuto.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/mirifuv.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/silimaviluvufutokebura.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079eb57467b9---33178907301.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/40960229357.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_off0000d2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB6 18112 bytes
SHA-256: e5187ba04a46c2455acc8d9a7dce2a0ecffbe88ee349144e1b1783ced4ab0cfa
font_02_sfnt_off000119dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DC 10888 bytes
SHA-256: 035e8c18ac481ed15c8af7187877b23a838b8e7febe7b7b286577058ffddb5a1

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