Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ed06c64dd451b5…

MALICIOUS

PDF

76.5 KB Created: 2021-09-04 20:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ea3932d370225f8a06416e76dfae8d69 SHA-1: 030ff37bd2886e1a0b8eddfc8ee4dd4aaa706850 SHA-256: 24ed06c64dd451b5d04bfa6b23762bcf2490d20856b4b5ee6281abfcb3038d31
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as containing a link farm and potentially malicious content, with a high ML score and ClamAV detection. The document's structure suggests it is designed to redirect users to numerous external websites, many of which are hosted on compromised CMS uploads or disposable domains. The primary goal appears to be directing traffic to these sites, likely for phishing or SEO manipulation purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://twfindia.in/userfiles/files/58791857598.pdf In PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607363775335b---jipataxotosejunuvilako.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/02dba4438cc3250868a8e0a65cfe1557/xaloxufelorijakep.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/02d27bcc06ea386f646374775d7dd59f/tufofupekurukamejodepor.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/e185d79cca7e8e0c8877db8fc45bfec8/59927738737.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/068bbcabb7c61cfd3f19ce3db424f25a/ladaburosijilamesasagefe.pdfIn PDF document text
    • https://ivanamihic.com//files/31594637491.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/rusaweligatejuvegamolu.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1627653715.pdfIn PDF document text
    • http://linza-market.ru/upload/files/23820700514.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/nezoxe.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210702001607_wx3d7a.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c71f1f438bd---zusufisajile.pdfIn PDF document text
    • http://grabnerestriche.at/50381324534.pdfIn PDF document text
    • https://led7.ru/file/simosob.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/12440622438.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6baa27e72d---88194213284.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/54479966766.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/fegolenu.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/8eba5b9a91081277f5547ab836c38147/rowuvudova.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///lamonuxatukopexato.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/db973aafc09748b37f5cbb4822c67e13/pesawedadujikapu.pdfIn PDF document text
    • https://afayl.com/userfiles/file/jejolunolopoduk.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/6023831526.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=pictorial+drawing+exercise+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_off0000c50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC50B 17532 bytes
SHA-256: 046697b94a2d1e5cd078074645eb9f21cdb2908c7b93825c2817efa73ef52641
font_01_sfnt_off0000f24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A62 10984 bytes
SHA-256: 3345a4c6937f050a0f722e0f26f367df5ce306867867e3cfbeb4d05a0226e1dd

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