Malicious PDF — malware analysis report

Static analysis result for SHA-256 2347fbfed1d6ec24…

MALICIOUS

PDF

86.4 KB Created: 2021-09-03 21:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 80e2b1fcf04e47c692a64774f8dcc439 SHA-1: 0983ce1d2901a881a77d31c6429a3e1a3776af28 SHA-256: 2347fbfed1d6ec24b46caa8bdd7a93a53a7c9e5cac39d99911894e0f4781bb39
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' button lure further supports the phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://inwebjor.ru/uplcv?utm_term=best+site+convert+pdf+to+word PDF link annotation
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/g18hnt6ra8t859150qt4kbg2n4/94398589905.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/d92q8oo4d40ljd1ci4th5072p2/fopuporuvirozugusawixef.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/vevelusajeduwepezuzuj.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/50014270178.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2a25e3121---fulapovofuwa.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/nedasaz.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210730_D35718E14FC90D5F.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/sometolapir.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/47590392828.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/fotudaxigikuto.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/gupozolofimob.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/51027258099.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/bpodebmnk57dali0lq6h95o8d0/wajuwumenunatuganuzu.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/11499848726.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/56909760069.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/8852811447.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/xarabapizasowobuten.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/db9af2f9372173d7a7f3756f23c95f0e/54056437975.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/vuboko.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1621753126.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce02f1c0033.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/97336650569.pdfIn PDF document text
    • http://praguetransfer.com/files/file/numowoxobesuvow.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/4eff36145ce9eb61e5f9d648ab9b8550/mudolovesafiko.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_off0000eb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4E 10612 bytes
SHA-256: b63d0d39976e54e42bfce290237b2c3d3cb5f74b024bb2fdd72a88466d2412be
font_01_sfnt_off000103c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C7 18536 bytes
SHA-256: 84e094884ea34f18980b7fe0fe37ac13df876656eee84abf0f73d9cab4744a68
font_02_sfnt_off000133b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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