Malicious PDF — malware analysis report

Static analysis result for SHA-256 9933b896042a43c2…

MALICIOUS

PDF

418.0 KB Created: 2021-06-29 00:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9e7e4496edad98ecb333bd8f4e36f40f SHA-1: 0d8497312521712678bb6a983dace32d0fddd3e3 SHA-256: 9933b896042a43c2df65c301097635432ecd678c51c2e00bd03e1315670ed9e2
174 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. The heuristics reveal a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host and distribute a secondary payload. The presence of invoice-related language further supports a phishing lure to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8414

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://soflocops.com/clients/67403/File/bakumo.pdf In PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b059151c6d5---sadufixojeliwevepegu.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86c7a08588---90213046603.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/wimapabovibarezemunuke.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/budazubezazofi.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d79236eb2---xewisunutumivefim.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/5aa25e6c61a99dbb19a9b560bfc681ec/wewugevefepiboginarazet.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/2c3f6fe22ffb60dab57822f3be49f111/lagelu.pdfIn PDF document text
    • http://udaybharat.in/ckfinder/userfiles/files/budojafidu.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/60877108942.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/77302020107.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/dumedubudajijabi.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/c85b27a3b8d518199c535560835f4055/92103613226.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608199f00a9b7---zafakuxofifaxal.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/9fb0f0acd4e5c43d0af319c7a0dbf743/jivuvufujul.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/d9c76a4dc2ce3f1b8a5636fdf2c40457/vutunivubulirif.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/32041003066.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b3d091d67ccd0b7533e6a0b90c227fdd/12667149902.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/39766782775.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eee5f707bf---mesadimedanozuwumimax.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/8440646a0886c154adbbbc48dc823a6b/72344283587.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/ab0a95aa582b35ee50172bad16869e92/2887906869.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/nejuzomu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=intermediate+financial+accounting+by+millan+solution+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00061207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61207 11124 bytes
SHA-256: 918edf4678cc2566181b85fe5df109e1dc34eb609575af12bcb2462d839be22e
font_01_sfnt_off00062bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BC6 18808 bytes
SHA-256: a48c2f1652daa5165425bbc5a40d38a0bbe70e6ed2bb33fd3f6fb454fc5f3612
font_02_sfnt_off00065db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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