Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e30f61d47cbcec…

MALICIOUS

PDF

84.3 KB Created: 2021-09-17 08:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5bf59febe43c97bf350186203f6b53cd SHA-1: 556f689ead59dca3419102a27d6e6fa660d154b7 SHA-256: 17e30f61d47cbcec90f589ec21c3dd4c6e487028de54de3de0bc8cd58f8a7d2e
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The presence of a 'password-protected archive handoff' lure suggests an attempt to conceal a malicious payload from security gateways. Multiple embedded URLs point to potentially compromised or disposable hosting, indicating a distribution infrastructure for malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://daotaolaixesontay.com/uploads/file/zovevipupopelutuseveretib.pdf In PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/uhc19o3huv2t4s2akq3l9ndb8b/64718436932.pdfIn PDF document text
    • http://beijingteye.com/upload/files/vixaxofuroguxonuxu.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/92559672140.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/62205474738.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/23781494033.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/26714153211.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f658d4a99---88081856796.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/23956626034.pdfIn PDF document text
    • https://attack.lt/images/files/tuwowufalezuli.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/korusa.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0d555dc44---50326683639.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/91151430.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/sakavaboxukikuginelerafo.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/xasijenipa.pdfIn PDF document text
    • http://kbcsisa.com/upload/fckeditor/file/bolopagu.pdfIn PDF document text
    • https://baruipur.org/ckfinder/userfiles/files/69520645811.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/20115903997.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/31224249034.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/xutaxujepovufate.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/bizoxovamonikepenal.pdfIn PDF document text
    • http://chafewyuok.handysociality.com/upload/files/zubuneteni.pdfIn PDF document text
    • http://midel.me/userfiles/file/80385297429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=android+defrag+pro+apkPDF 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_off0000e64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64B 17508 bytes
SHA-256: b6989757a636f11429e34b7a9f73d1c5393bcb9f8b50b3c6332e3fefb2fa9e47
font_01_sfnt_off000113f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F1 10436 bytes
SHA-256: 0d6637b72abe71d64f4799902fe09e04787d64ce7ac832bc4a437bec3adf2d66
font_02_sfnt_off00012b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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