Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed3fe8110ea6459…

MALICIOUS

PDF

87.3 KB Created: 2021-07-05 21:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e40536b4675a6b06e33069a105a42091 SHA-1: 6b75aad391de5a4228884599d7f95d0020087383 SHA-256: eed3fe8110ea64597b3ac8cf0578b9e48b3c474c8dcefbc40829153f38dfa298
196 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, and it exhibits characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on various websites, many of which appear to be compromised or disposable. The primary purpose seems to be to lure victims into downloading further malicious content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/37077e55f2036f57c4bb2465f9ccbb4d/gegeruvonanonopejabufiza.pdf
    • https://travelstore.tn/userfiles/file/ridefepuzidexi.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e39002e378---dulodi.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c83c5022a---36717001085.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/4vf85o1ji9nqlbg3fv6kn2sai9/wukesafotisekevozuf.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077daa1f1bdb---58000386802.pdf
    • https://zoorichi.com/temp/fckeditor/file/40719060391.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/qd45b5nm5k2khbq3sif3blp3t2/detorebadivu.pdf
    • http://rustproofingottawa.com/userfiles/file/83938277009.pdf
    • https://fokusmedia.com/images/uploads/xusekifejavobafolozagi.pdf
    • https://sheenabusesandcoaches.com/userfiles/file/77826376128.pdf
    • http://akcjonariusz.com/UserFiles/file/xemoga.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aeeada44b58---60790065673.pdf
    • https://maximatrimony.com/ckfinder/userfiles/files/zevuxodopuxufuzugokufo.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/19990616894.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/82ff4a1f493e78bbe0d41016b0dc0cdf/zejomakuvel.pdf
    • http://rld-carbon.ru/file/xepimiwotefele.pdf
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/92892342504.pdf
    • https://dacola.com/upload/files/dojulu.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/3dfbp3opsekcc3at7uq620fjrb/juperefon.pdf
    • http://1hozain.ru/files/userfiles/files/wexixov.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/c4so1ll3o8ckorfj0a6iqnp7f2/93712767251.pdf
    • http://dafangtour.com/fckeditor/userimages/file/kubuxolon.pdf
    • http://ctyrkolky-gamax.cz/data/dokumenty/13784173989.pdf
    • https://chiuman-hk.com/images/file/67839116495.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/09eeebe31807afa3eb991d928efe803a/zinazaririwegini.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=play+gk+quiz+and+win+recharge
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef7c.bin
4d4f1f2ec419e502ec76c0c2d8d8a0280ca9e6a891fe0f172361c40dc487c6b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7C 18092 bytes
font_01_sfnt_off00011f2b.bin
f6dea55e744119dbca66e558185daafb3dca2404e91448ec4ddd235f9ddb3245
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2B 10860 bytes
font_02_sfnt_off000137ba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x137BA 16792 bytes