Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef18aee1313202c…

MALICIOUS

PDF

87.0 KB Created: 2021-07-28 12:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9b7e3c36761856e6138de2e0f6fb56b1 SHA-1: 949523f939d211236781cbaeee112ec31fd23230 SHA-256: eef18aee1313202ca77f1f1387b026f98f2654fdbc3a29f4607511a24809f12e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious or deceptive content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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
  • 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://vce34.ru/attachments/file/26602583071.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/s5gttd3h21nl7qqc21q0kfsco2/dawijenuzubozexesu.pdf
    • http://ambvetsanprospero.eu/userfiles/files/tomomanudijol.pdf
    • http://esipro.lu/userfiles/file/nekamozerutulo.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ce5769ec6f3---lubojuraruwuwa.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/207d914a07e4b70e89fcef3c8f8ea9c9/zapavusuxukemomit.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/573de49d5fe72688104259aee395cfbe/32200784420.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/oqujip41cnoddonibv9omsjih2/9658546004.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a067c4c650b---96053553774.pdf
    • https://delaneyllc.com/ckfinder/userfiles/files/23804975879.pdf
    • http://108homed.com/userfiles/files/94324759070.pdf
    • https://ises.ca/phpsites/vertical_living/uploads/file/9579008896.pdf
    • https://belloverde.net/emailer/file/43759905006.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a5fe4e94e---7545932452.pdf
    • http://hum-lucknow.org/test/fckeditor/file/witogoruvupufazetife.pdf
    • http://cuahuyhoang.com/media/ftp/file/runivawanufozal.pdf
    • https://loyallcanada.ca/editor_files/file/bevewugopizukasut.pdf
    • https://2acontractor.it/images/file/dumufavakedeboguze.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2fe83975e---40379146644.pdf
    • http://wsp.pl/userfiles/file/nixusokemoda.pdf
    • http://progfin.pl/userfiles/file/9771938831.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/ddra0573mcfkcbtvq00o72cls5/ledaxaxubopiniw.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/2bce8eece3f6667cbdc446b58cfc1f9f/mevalikagabu.pdf
    • https://aterhesseg.com/up_image/file/20045406287.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=teste+que+faculdade+devo+fazer
    • 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_off0000ee58.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE58 16792 bytes
font_01_sfnt_off0001066f.bin
131a7a842687375657117a4fb83c787ee16c75368dda24a78db5bb192132e88e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1066F 10608 bytes
font_02_sfnt_off00011ebe.bin
a6e9c4b6f6ef600ec87b6a954ed65c078972cbda59c4f16e8f2ed110c5b64c24
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBE 18792 bytes