Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce2229eb84c287d…

MALICIOUS

PDF

81.8 KB Created: 2021-09-16 05:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6c679e3cf86736fb2029932ddebc31ae SHA-1: 9fbd6c459b27c3ce13e3667a52a289b5c43986c5 SHA-256: 1ce2229eb84c287d272c76183927cef8d72ecec164cb9062123be8a0ed77d150
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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 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://mimpiindah168.com/contents/files/45372377747.pdf In PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/1230074d256c75d7747124bd4ba74e1a/lokadalarazomazapojifadi.pdfIn PDF document text
    • https://nk-sostanj.si/files/file/13250606168.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/buzubedomajesavid.pdfIn PDF document text
    • http://chukysovin.com/img-svc/files/romegibesolagazesuneviges.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1768ed5b5---88936374630.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/89527970514.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/jigimo.pdfIn PDF document text
    • https://cemb.ca/upload/editor/file/39195384397.pdfIn PDF document text
    • http://aeon-dev.com/uploads/files/202109100420163408.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/wezer.pdfIn PDF document text
    • http://kooijobs.in/ckfinder/userfiles/files/mifemiseb.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/37379407935.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/75157d1878765665c134c578eca40190/rusetafamorifixinevi.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/44292314118.pdfIn PDF document text
    • https://sabresources.com/FCKuploads/file/nemodaj.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/38971458765.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/wuvigufiwan.pdfIn PDF document text
    • https://wonkingchina.com/d/files/53576194614.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/81171277072.pdfIn PDF document text
    • https://samsungdvm.net/upload/ckfinder/files/51183234380.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/terafaluduwa.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/gipaxilu.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3e1a19219---worazakemuxajilojamura.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f1b49a8fb---21055476763.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=best+comic+drawing+app+androidPDF 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_off0000da9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9E 17604 bytes
SHA-256: 4de0e709f0900527f515a65730c49aaa8031066a534401dcaded4826f9d67dc8
font_01_sfnt_off0001084a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12061 10948 bytes
SHA-256: d71cfd5be67b90088badb3286154baaf635fb24a725766da416400e3ea131f07

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