Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a507fffe554ba2…

MALICIOUS

PDF

78.2 KB Created: 2021-08-16 16:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 68ea35a16f1681dd9ff5288f63a179b3 SHA-1: 47e52d6f640abf685ac791eb9251b3e54a8970e9 SHA-256: 03a507fffe554ba22c9039af9674f67ac15d50dc20b5b251421fa31bf263634f
156 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to various compromised websites and disposable hosting domains, likely to facilitate the download of further malicious content. The presence of multiple links, including one disguised as a driver download, suggests a social engineering attempt to trick users into clicking and potentially executing harmful files.

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 http://ampletrekking.com/userfiles/file/54450260022.pdf In PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3fa3efaef---69855430365.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096de4517cc0---25443568650.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/57a1db54d668ec0e93462758c0fb5efb/78629261895.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/44486893326.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7237d0371a---jozuzalera.pdfIn PDF document text
    • https://chogmai.org/ckfinder/userfiles/files/kizosime.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/24650779924.pdfIn PDF document text
    • https://marosme.ro/hirek/file/43074640664.pdfIn PDF document text
    • http://17njl.com/userfiles/files/fuzovagosigibukuju.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/16903924425.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/58151278132.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/41771065661.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/revimakuna.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb6b8193fe---kotegejopute.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/wulegijidatebutu.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cae21cded9a---87341817220.pdfIn PDF document text
    • https://kueapem.com/contents//files/sakilajijiwaxawotavi.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160757a7c0e23c---13013057575.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/luperurimoxuvetel.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112bf1d54f13---vilusoburapegitobifixobup.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/ranasasunedatojubi.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/pizegenuwuwaxudipimotip.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/68360891691.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=pci+basit+ileti%C5%9Fim+denetleyicisi+driver+indir+win7+acerPDF 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_off0000cac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D9 16580 bytes
SHA-256: a7e22e2295d568b9e176a64485b70cb438dd7f00541c614ae171a845b4bc9004
font_02_sfnt_off00010dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEA 11112 bytes
SHA-256: 733005ea5046809be086cd955107108068ece3561e207820c4c5ee4e97929a0b

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