Malicious PDF — malware analysis report

Static analysis result for SHA-256 45491e46731faee1…

MALICIOUS

PDF

103.0 KB Created: 2021-08-15 05:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 55d98f565624838cd9a9029d995d5fbc SHA-1: 24eaf476876b385936f56fb42ccc77b3e535620d SHA-256: 45491e46731faee1ec6c8eaba60d4a0ecf67db248f6de72a3ceaf6e621b5a6d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. The presence of a 'flight booking template' lure in the URL parameters further supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/a02f64f0d6323bf58709d897b03b3a5e/gomabukitota.pdf In PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/cc928d5188ad72ba2a9abc7a9cf65ede/90516231804.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/adbee8b447ac5c9dc5d3ad8a59fc3c74/ropekufubumebub.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a56a558c4---zekarezilexenibuk.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/lasezugonoguma.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/68975089289.pdfIn PDF document text
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/33115466929.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b5df5f86a73---31381411657.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/18247147392.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/dujejodovazotusafoxolorev.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/29585575915.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/gizizanafegetaji.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/tiduno.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b0b4bb327---wufapabexopi.pdfIn PDF document text
    • http://flirdining.com/uploads/files/razuvimom.pdfIn PDF document text
    • http://peak-experience-japan.com/64333143630.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/19935460564.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7e0a5fc6c---66696194652.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/18253179580.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/15828fd9bd785f3eeeb15a7d05f7759d/polofibezimigofisune.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/39d08d46653258219d8b281f4c8144b6/telikug.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/9142965475ebc3bb08c8e30fb4210234/zifazejev.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/fukagefodikata.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/npllfo7ckg5bgqlg7racft6ffe/bagisovufedig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=flight+booking+template+free+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_off0001317d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14994 11072 bytes
SHA-256: dc073d2a655a14bbac3bc5b3a974acf1f2711cb997bb11f6e883ae5cd01c2a66
font_02_sfnt_off000162b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162B9 16584 bytes
SHA-256: f4735545e11bf6c1f0e010538f672172f1f748457f721ed7fee50765fbb1e005

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