Malicious PDF — malware analysis report

Static analysis result for SHA-256 92075ed5406e0f70…

MALICIOUS

PDF

84.4 KB Created: 2021-09-12 07:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4f9e645f2fa74b57ab0d6ca98001eed4 SHA-1: 5e42c99698e7312449eb5279af3e234802963886 SHA-256: 92075ed5406e0f704a7ec4ab29f02b169d4c3b0157fe49de6db6791dcded6ea5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, indicates a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the links and the overall detection suggest an attempt to lead users to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134428e0ec04---92362752800.pdf In PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/49876434716.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/lakidi.pdfIn PDF document text
    • http://nguyenphat.com/public/default/ckeditor/files/keregotubuwofub.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/pusexajuxetopamebef.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/46207039572.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/burefumojuwexaguxexupen.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/b7a0ffc4172437d6966033a525721c8c/runamuwifasuful.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/refufadabikiziwegijowum.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/rovokizivokinilek.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/82174657792.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/16728706071.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/pozufuruxada.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/zaruredazunugape.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/gufemewofefoxutadub.pdfIn PDF document text
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/5647042374.pdfIn PDF document text
    • http://kfbma.org/files/fck/file/80427455634.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613593db92978---bugajobejegij.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/85225627294.pdfIn PDF document text
    • https://escolaalfa.com/userfiles/file/27886114550.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/zomikopelepexaru.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/47056863989.pdfIn PDF document text
    • http://c2r.su/uploadfiles/file/2021091010111773499.pdfIn PDF document text
    • http://pet.nfe.go.th/m_site/ckfinder/userfiles/files/88374005493.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa06c62a72---39203127542.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+delete+a+contact+on+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_off0000e7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD3 17040 bytes
SHA-256: 33105c3a59878cb51e63351b151e4191b998bddab3bd51f230a1b4735681a3c6
font_02_sfnt_off00012c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6C 10272 bytes
SHA-256: eabf354b56a4858c7ea44a9085e4744b5746eb6475b57ec2d06d50f5f0297925

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