Malicious PDF — malware analysis report

Static analysis result for SHA-256 442341aed2e42474…

MALICIOUS

PDF

76.7 KB Created: 2021-09-12 20:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 00061cfb98cea4233a7532a073f7668f SHA-1: 0958aae32b9e2ef359107ac967be2b3a962c44ce SHA-256: 442341aed2e42474bcc6d32b3d9c6018762379bd963d258bcf2ddd9091da2c18
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. The document contains multiple links to disposable hosting and compromised CMS upload storage, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The presence of an MFA lure indicates a specific tactic to harvest credentials or session tokens.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://probeg2000.ru/files/userfiles/files/13914454819.pdf In PDF document text
    • https://shop-ecobati.com/medias/upload/files/rolalimerulizupi.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/19132496547.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/35821396047.pdfIn PDF document text
    • http://rurisnet.org/images/file/15484982354.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/wukalosisasiwasije.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/nogibudizefos.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/duxagemoberenubudalif.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613badd46cab1---96686726154.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///denokemerugofivufitunilu.pdfIn PDF document text
    • http://nhahanghienminh68.com/upload/files/mevajajebafuzufiso.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/15375222426.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/53017952472.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/tugozeta.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381a2b93777---81968845101.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307d4296fde---jonabizajib.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/lojuzuda.pdfIn PDF document text
    • http://swhos.com/upload/files/72996020473.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/xalalexorawugokapuwabixux.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/xagiti.pdfIn PDF document text
    • https://booking-news.hkdnracing.com/webroot/editor-uploads/files/laditoposila.pdfIn PDF document text
    • http://na3.it/misc/file/bokenemafid.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/pemibabopezutarerox.pdfIn PDF document text
    • https://ms2oke.com/contents/files/puvifilakapazajagibi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=paypal+money+hack+apk+downloadPDF 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_off0000c718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC718 17692 bytes
SHA-256: 6da6547c14483b92864fcca60b512267e20ca1f6d0c68c5c4e1edde68a4fb5ec
font_01_sfnt_off0000f4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D3 10616 bytes
SHA-256: a02343cf68deb2d2fac67009c8aab8f1990925ff310373af3de01f0c68606a71
font_02_sfnt_off00010cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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