Malicious PDF — malware analysis report

Static analysis result for SHA-256 706ea02cdb8e1678…

MALICIOUS

PDF

80.8 KB Created: 2021-08-28 13:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b4d19ad118eb3ea8115d66fe93353a69 SHA-1: b407de3a237eafc33327888be84bb651ac03392a SHA-256: 706ea02cdb8e16780f117e21fede7a3c73c8410971fc763e380fbea975f3d0e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The embedded URLs suggest a phishing or malware distribution scheme, likely disguised as technical communication to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://huntic.ru/uplcv?utm_term=technical+communication+paul+v+anderson+pdf PDF link annotation
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607235e5068af---56007414933.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/niwefogukeniratiziwimimi.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/76615818429.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/dedoduzalifodubiler.pdfIn PDF document text
    • http://learningkey.org/userfiles/15355978543.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/6i9mt0k5892qgubkfo7jhir9i6/bepodidunetifuxa.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nasiboriso.pdfIn PDF document text
    • http://technocom.pl/editor/file/60453123606.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16100ae39503d6---vajijorirajekujigamukelud.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/625c4a3fa06c68be7b638cb5ef3b3432/vukitam.pdfIn PDF document text
    • http://ofitecnic.es/files.ofitecnic/fck_up/file/27528007669.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/22d2905a7094ea179f14f40a9a84f1a8/xemobimazegoxufuda.pdfIn PDF document text
    • http://cmrivestimenti.com/userfiles/files/waxetufa.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/1103409858.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa2b7d8187---30015859725.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/4ea08b78cd5c6d183b020b03c56777a0/tekidamajozofarera.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/3d46331ba44884d58a8928667b5e61ee/xisexezibo.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/59827302661.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610928a494357---xidalokofulozetimojazux.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/dumitezofanukelanuku.pdfIn PDF document text
    • https://rajaketiga.com/contents//files/tuluwopogipivudipag.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/5e63369409a69027f9d118f9de24bd4c/60977671945.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161296c5923a37---7184554302.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/wudofuvogonisejuleku.pdfIn PDF document text
    • 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_off0000d595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD595 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA7 17856 bytes
SHA-256: 594700fb6e949eebf5c9cfbd9b51ea11dedfac595b372c65fa2a9271be6f086c
font_02_sfnt_off00011b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B20 11016 bytes
SHA-256: 05b204eb009fe5ed8177717ea68ccecce410664fde1c98b421164755205dfd15

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