Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1487fdc75e86ec…

MALICIOUS

PDF

82.3 KB Created: 2021-09-07 05:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e4742d4a8f5106794c72713b40de0f03 SHA-1: f05007f03111ad05c983e301a8eb9ac7d2fbc5d6 SHA-256: fe1487fdc75e86ec8c469cd4327b17622e7a279bc05af9c964365af432a1693c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's content likely attempts to trick the user into installing a browser extension or update. While no scripts were extracted, the presence of numerous links to potentially compromised CMS upload directories suggests a mechanism for delivering further malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/niwegabavopabimug.pdf In PDF document text
    • https://alice-immo.com/userfiles/file/veburijaxotedexobig.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4bd88e86cd---56001009430.pdfIn PDF document text
    • https://maturana.cl/upload/file/zurusakojosokup.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/21903512465.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/34fdf645fad4302af3316aa7194733fd/40904537925.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/lizaxonoza.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608800571b647---juwofaxukeraliso.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/jowuxekovapidigori.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/loterimop.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aafbb170bb1---32588909716.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/68673694590.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/fujdlbkv48n6o9i5b6ivl2gla7/zapolara.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16105688a21800---45847944115.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/1b6dd4d704df9c40f883ba543ecc2e93/zuliwuwavunomiwopimezotif.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d2e77c9f0---tirodazijulavosexezibi.pdfIn PDF document text
    • https://magatek.com/documents/file/26468092818.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac67dbc53bd---14422132709.pdfIn PDF document text
    • http://bkairconditioner.com/uploads/files/soxiruxajotufulabiriwetut.pdfIn PDF document text
    • http://famillespourstarlight.org/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/wafeterorapejedi.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41a303d421---51142708518.pdfIn PDF document text
    • http://beiks.info/public/file/fenuliwirase.pdfIn PDF document text
    • http://rewitex.pl/userfiles/file/98350201478.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/o9o8uaa812rqrqlle0t2rj2gsu/jovaba.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f50df330b25---26536388396.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/22072157374.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/vagonurininasekovuj.pdfIn PDF document text
    • http://woodsfamilypride.org/clients/2/2c/2c83419adcf4927d74d3defe18342386/File/gitiwize.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=interrogative+adverbs+pdfPDF 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_off0000dc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2D 10784 bytes
SHA-256: ad227b720e907786431f3ed8a1f0e523c4db05e32d25c477f0bcb4ad1eb61a44
font_01_sfnt_off0000f4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD1 17976 bytes
SHA-256: 6a3d3008be446e585b130ae06d54a6a9a3976d1c757f7fd0fc01a9564d8abc3f

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