Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2030015e73a53f0…

MALICIOUS

PDF

97.3 KB Created: 2021-09-12 22:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 990117fbcd022d2bc33e349dd1f0d7af SHA-1: cdb0414b339a0a9e58bb264862f9dec67d1a9258 SHA-256: e2030015e73a53f08b520a218f95a3cdf98475a3715cd6c0b2c58805cfb1c589
204 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm and employs social engineering tactics, such as urgency lures and a browser extension installation lure, to trick the user. Several URLs were extracted, some pointing to compromised CMS upload directories, suggesting a distribution mechanism for further payloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://hoitruyengiaocodocvietnam.com/uploads/image/files/maforedifijo.pdf In PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/49418de203b131f1efebaaccf8269591/6423432704.pdfIn PDF document text
    • http://ucg-eg.com/userfiles/file/20669937345.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/17456763593.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/zopudokuzoroxu.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/83eada430b614f71775cc455b7196a3b/xavawevipizapobapebuz.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/58002764182.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e7d3c1a52---sezozubopek.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/56163171938.pdfIn PDF document text
    • http://intimatehotelpattaya.com/image/upload/File/15609126986.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/kijoveviribobuxezigepuju.pdfIn PDF document text
    • https://papiratisk.cz/soubory/36805092347.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/37865179910.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/kivisujapidefirumul.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/lifixaxilekilu.pdfIn PDF document text
    • http://blgjad.com/upload/files/51490986929.pdfIn PDF document text
    • http://leguido.net/files/nurovusa.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/rafetisanu.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/58884542474.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/kivenebolegolizonatuma.pdfIn PDF document text
    • https://floridahouselottery.com/test/userfiles/file/7951103668.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/xozosunu.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16134688f658bd---32958313421.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/menowipaderatulo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=followers+gainer+app+for+instagramPDF 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_off000117b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCA 10764 bytes
SHA-256: b4612f4ea896c1031fcd23c593e45f1898babb6ea174209097c4a52d45add536
font_02_sfnt_off0001489a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1489A 17896 bytes
SHA-256: 2e6d2d4d1f862ccffdfb30efb2866a25bca5ed34f22bfd363fb21466680eb390

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