Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0dce2f7a70a53f…

MALICIOUS

PDF

80.6 KB Created: 2021-09-08 11:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 42a2a2edfc6bd7862fbac0be24f0b95e SHA-1: 535f1f24f5bada26d528bc3c522709785a761df3 SHA-256: ad0dce2f7a70a53f3b085f24badd167205aa07658d8bc422b7595de4370a1d07
156 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. It contains numerous external URIs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to direct users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://catamma.ru/uplcv?utm_term=t%C3%BCrk%C3%A7e+s%C3%B6zc%C3%BCkte+anlam+test+pdf+indir PDF link annotation
    • https://altonika.pro/files/fck/file/45560034893.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/tajojekulipi.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbff92fed1---89304467019.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/234ef4b4b0c1ca0d9a808eba0cc7e1ac/fubexelomila.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/af514b0b7bc34b5eba3793b7af1e67ca/32889954253.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e49bc4bac8---39296086379.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdd7ae53bc---48430709599.pdfIn PDF document text
    • http://poorclarescork.ie/images/zikapivakine.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160db15c47d1db---fimuvenarajutedujeb.pdfIn PDF document text
    • http://www.hmh.sk/files/articles/file/98004000257.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/6997790425fd7f9010a3e612274fbfcf/36753199423.pdfIn PDF document text
    • http://serenetransformation.com/clients/870552/File/63093215690.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a65c62479e2---wugavego.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/somojugirulevaf.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/71794068721.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/ehft5e1nb7qq6rptb7ee4fpcm2/farunasopejenuma.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/tovifaxovuvul.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c41ac9cf2ae---gusirotezitodulejib.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/97737777269.pdfIn PDF document text
    • http://kuzfarm.ru/images/file/sufaxavigobuzexazo.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/mebogedotusa.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c7ac0d5a9---42427064478.pdfIn PDF document text
    • 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_off0000d2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A6 11380 bytes
SHA-256: b582f7d20ccee490fdf0a04357dd3fa48917d09e917e18aa6da3688dd816f404
font_01_sfnt_off0000ecde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDE 18836 bytes
SHA-256: 936f45122240c1592f270051a98ccda15af57d751823bf81fa0b8ce119daf9f5
font_02_sfnt_off00011ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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