Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e907836cef2f2e…

MALICIOUS

PDF

85.8 KB Created: 2021-08-04 23:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: fa2e2078761320f72835e50c6c35ec11 SHA-1: fc21560683d61c5bf546ce4ab9e19769964f16ca SHA-256: a3e907836cef2f2ec7e326e2953f34aa7dfa74170dfc4f77c13eeeb8be04595d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm hosted on compromised WordPress sites and disposable domains, designed to lure users into downloading files by disguising them as driver updates. ClamAV detected this file as a phishing trojan, indicating a malicious intent to deceive users. No scripts were extracted, but the structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4919

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://x04ydivan.ru/userfiles/file/lerijafaduredewusoredulug.pdf In PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/ed2f492496d2d1aadd0d45016c0c2679/vufibivulenotuzijet.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/3524248651.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc43830cfe---foxitajiligupu.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/cb66593805fb1cd110578f4c026bf2a8/76690451745.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608622795a286---67981850681.pdfIn PDF document text
    • http://championsview.net/userimages/ninepuresiridifafewoxal.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/7d2c4f6a543592f41939fe9516cc7e06/rebibono.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/34424649844.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c19674c7df5---96474355331.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/r6q51b1mnf0scsgap3qm1gj725/riseg.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a011ddbd3---68356559289.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/53067202930.pdfIn PDF document text
    • http://grhs1983.com/clients/72571/File/kojexumawizokudivosu.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/15345199032.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160852d1fd1874---japajeterunobaju.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/99320700830.pdfIn PDF document text
    • http://jmk.kr/ckfinder/userfiles/files/65532867060.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/ckvi1ts8toul1us4ci56lmi67u/siroladukijezorake.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/nagidomominurixiwemenazu.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8dd585ba786ea66ec52fb3ebd73011b4/25790422828.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc6423290d4---wolobepakozidol.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95308e28bb---giluketi.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/bdd8960384aee690e637fdf6b8c42898/fuzozibi.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/4609944db42ab2cd496d6decd64a1051/4500485090.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b26d0ebf5---razoxewedisibitajo.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/bipuvagozimutifipub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=rtl8188ce+driver+windows+10+hpPDF link annotation
    • 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_off0000fbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAD 17056 bytes
SHA-256: 80a6cabc52da7731c0db2154c84d0cd308f7b8e8db42dc44e7b994df36dddafd
font_01_sfnt_off00012831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12831 11028 bytes
SHA-256: a36a336a10986ff41ec99ff6e1a2cb33e0feb09b927e42eb670e851bbbda42dd
font_02_sfnt_off000141d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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