Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e02da09d253c12f…

MALICIOUS

PDF

82.9 KB Created: 2021-08-26 02:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 06490f3919b925424a25e60e8f6b0f18 SHA-1: 1ca3de324d36df3636c203e1fec40d4fe8f19825 SHA-256: 9e02da09d253c12f77eb8f821d202da98a0b55b501121b2d2978884411c28366
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a link farm pointing to multiple external URLs, some of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/kuxuramifevanizapa.pdf In PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5eb0e894dbb7561f47b69de008d1218e/naxikujadixaragane.pdfIn PDF document text
    • http://chargers68-50th.com/clients/3/3d/3dd154274af4887fbe356f6dcfc18689/File/60491221810.pdfIn PDF document text
    • http://piotrkowska77.pl/zdjeciafile/47684536348.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16075c09535116---pasuw.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/hv1mbues8f0r4hrpldoaogp842/20184982229.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/7fo02c8lomr8t4bcpo8idkjagi/zijufibukisabefubuz.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/13922698444.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/kikukozabopomijiloxatis.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/85103839343.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/897863381.pdfIn PDF document text
    • https://panificioilcavaliere.it/userfiles/files/rakanaxavipodug.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/94828989534.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/lijavodipe.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/basikusunogelopuwev.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb3f205cf4---xazojevuwoxuvolup.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/woradidoveriwonalop.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/wosifemidafapuguvabaki.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/318238ba770bbf5997d630f2ff04a2f1/94165360322.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16076025ee7bad---32406822624.pdfIn PDF document text
    • https://hgb.se/filer/file/556654458.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4f86b07de---zuzatufoxekezope.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/29719062485.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/funidopawusejalilipokoka.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/nebebogenuvulozumovugem.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/41719d956ea967e8da32345b4cee54ae/60791130738.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=gta+san+andreas+ppsspp+android+file+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_off0000e1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C2 16460 bytes
SHA-256: 6903230c20ad66fd8f1426a4f3b9e1724c60608f070c6ad52b3f686ad50f868e
font_01_sfnt_off00010c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C34 10616 bytes
SHA-256: 91db6a2f82ee1c3a44e35babe75bbc377a957a8f9576279b39939f53d94f56b5
font_02_sfnt_off000124a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1