Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c240e0126ac9cd…

MALICIOUS

PDF

78.1 KB Created: 2021-09-09 12:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2e686bdc78ce38117e80762d997b330f SHA-1: 48b2af4e9936850d1531587f28a8b1636db2156a SHA-256: 30c240e0126ac9cdadc7ffc49d15a1d606c9c4690fd7567e80198fe7262b0bc5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document's content is designed to trick users into installing software, a common social engineering tactic. While no scripts were directly extracted, the presence of numerous links to potentially compromised or disposable hosting sites, coupled with the lure, points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://digireg.si/upload/tubapag.pdf In PDF document text
    • http://owop.challengersports.com/ckfinder/userfiles/files/rogixemosol.pdfIn PDF document text
    • http://dr-temt.ru/images/file/lulolexo.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/dlpnsgmrm90lb3a8orbskq862h/joluxoje.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/dibigowowukuruvives.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/76172136567.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/71412058715.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/gisefapufapusafebososoriz.pdfIn PDF document text
    • http://a899.net/userfiles/file/ludaparilesaxukadegusojes.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613992cfcae03---zixarisilidupik.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/1840502611.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/85437584677.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/29d561379ea7d35651e0facef03f23ce/sawareseganivi.pdfIn PDF document text
    • https://truonggiangcompany.com/userfiles/file/36156461148.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/judunegemurej.pdfIn PDF document text
    • https://www.tvmreza.tv/ckfinder/userfiles/files/3065217291.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16130f57c26acd---81364365301.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/fekezebibe.pdfIn PDF document text
    • http://balaton.varosom.hu/userfiles/files/winubajebesusasutavekaz.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/9899892490.pdfIn PDF document text
    • https://themis-lex.com/userfiles/files/ruladiw.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/c2ef795143b36319bcffe79fed799b3c/nizuvabewuseziraxobex.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es/ckfinder/userfiles/files/zexiwoguneliwu.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161372d82b1424---63389146916.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/89961424178.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=creating+a+table+in+android+studioPDF 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_off0000cccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E1 17660 bytes
SHA-256: da6f2fc8ce6e49e8e04e32476f8e3ba4fbcd162ac73755ccf163d4ba460b07cd
font_02_sfnt_off00011238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11238 10696 bytes
SHA-256: 0a131c3d93e2acf9b1fe391aa6c7c4187aafe166b28d30febc1fba63a47bdd2b

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