Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea69e13bdbcf243d…

MALICIOUS

PDF

79.3 KB Created: 2021-09-16 00:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3542921a8b0565db9e0757c2b9ab8d4b SHA-1: cd206055673980a3b8ab0304a757310b7d29f4b8 SHA-256: ea69e13bdbcf243d9c7fe5065c2a89d8d491c99fc4c7256a3c4e0dd0a59be7b1
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised or disposable domains, a common tactic for distributing malware or conducting phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm on disposable hosting further supports the classification as a malicious document designed to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • 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.
  • 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://praguetransfer.com/files/file/7847518406.pdf In PDF document text
    • https://snapstudios.ca/userfiles/file/50722355194.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/minuxib.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/kalegemivoribavin.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/2551f708c150f8d144f423f2071b88e8/306426302.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/bawuxajawajeguna.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d1cb3851c---lomosisuriputib.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75703083065.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/49746053632.pdfIn PDF document text
    • http://fluorescent-training.com/file/27955041819.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/seroba.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613907e4ecc44---42528327138.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/166696a7bdfd91cabf6f595530952e16/44362721068.pdfIn PDF document text
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/45759208788.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/89509233506.pdfIn PDF document text
    • http://nmways.com/uploads/fckupload/file/zilajorimiragelolape.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/13257775443.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/zolujune.pdfIn PDF document text
    • http://kehlux.lu/userfiles/files/61460209373.pdfIn PDF document text
    • http://allineers.netlovestories.com/upload/files/dejunofutesuxudizu.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/fofoni.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/jobokomijezugipax.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/farilok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=nerves+jumping+in+left+armPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ead5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD5 10856 bytes
SHA-256: bebad69fbc27cd411cd6fb9657f13d2f42218340cd2d156003f66c5b4e78ad75
font_02_sfnt_off000103e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E3 17012 bytes
SHA-256: a3c512150821373cc200424fb913e7b981e1babbc4881147f1ac88520df894c0