Malicious PDF — malware analysis report

Static analysis result for SHA-256 092ddd9a3c5dbee0…

MALICIOUS

PDF

82.0 KB Created: 2021-09-15 10:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 99a0d2b2f17327c092fdd549dc4e9757 SHA-1: b5e8644e8513fa802e499b157921037fb91c5434 SHA-256: 092ddd9a3c5dbee06d846870ddcc9cd9bbc2a57502bb97607f736ea29a1fd027
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of external URIs and a 'download button' heuristic further supports the conclusion that this document is designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://medvor.ru/uplcv?utm_term=tactics+ogre+psp+iso PDF link annotation
    • http://dentalcenterstudio.it/userfiles/files/59247729733.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/4qujbo3gsidc8l79odia5r3a35/pevelupikupobuke.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/d5046e47b59136aa6c1f27ae18ffe71c/babemavunikesofunakudowu.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613739e77f3ea---janubuzuwonajup.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/jererawusazozavudug.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60768675042.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/58582184358.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/mokuruwi.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/paketazit.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/85da0bec7ca7908733b4b4b6f89ba4a4/98703952215.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614034d8e968c---48490479882.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/7aef442536a99561f7d8d332745fb1d5/gumonebe.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/bozem.pdfIn PDF document text
    • http://qdjshg.com/files/file/kovetusemidi.pdfIn PDF document text
    • https://renhedc.com/uploads/files/202109101322097405.pdfIn PDF document text
    • https://skywaytravelandholidays.com/ckfinder/userfiles/files/valafebevagixutax.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/b4c876a890fc9e19797c5249868e4c89/69060283433.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/lujumivikarutekotege.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141108a66fcb---16459165552.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202109131754342539.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/5139643615.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/23031524836.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_off0000d9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BE 10360 bytes
SHA-256: 0bbd1e3ca6f470741a209cafdf949bb1aac4678019c4d20793f5734478c7910f
font_01_sfnt_off0000f158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF158 18772 bytes
SHA-256: e2b8a5151999d0fdaabda535ae4178d578e0f652a33c20b16c04ce111b088420
font_02_sfnt_off0001228e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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