Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2e88f45733855c…

MALICIOUS

PDF

86.9 KB Created: 2021-06-28 21:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 009d98398e7e54c6e3ab316c12f3fdae SHA-1: b493282b4c29b6a875d6d0de7e3264ccb17256a0 SHA-256: fc2e88f45733855caf007380d8d0c88a66104cdc3e210844e59171ae49c444ae
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites. The primary purpose seems to be redirecting users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://dbhsreunion.com/clients/21010/File/90164494278.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e332f7ee54---19990928592.pdf
    • http://fioredda.com/userfiles/files/45905711790.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/3n0p9e82k80a9bsph753t6llj6/sataseta.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab26b481f45---76699353997.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609550089dc9c---papimizenejusug.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e83e63f24b---63455259029.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a87f7510aff---modisavumuwosixir.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84e9b5c8e8---26979548771.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/66990f8f3c76006840328894a26df0c5/rujogefudib.pdf
    • http://bscartridge.com/pic/76992011639.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086c43fedb7e---nixenupifavef.pdf
    • http://gramercygrand.ru/files/file/kagusazojig.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e23fca35f---49033224720.pdf
    • http://autodilykanka.cz/cmsimple/images/file/zajodov.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca06cc389bd---meragun.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e143ab271---43577711742.pdf
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/bitoropifik.pdf
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105151115106595.pdf
    • https://afayl.com/userfiles/file/74456814657.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/i6cahakqgccus50gl6f1g93cki/31796591939.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/ro2hc92rmucnidoaoh9d2bek3q/8025600502.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=cheapest+type+of+foundation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/korawaderuvag.pdf
    • 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_off0000f211.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF211 16792 bytes
font_01_sfnt_off00010a28.bin
f62f3228fdc4a3ad165c45a89a9f0222383f89385caaacba90b7c353dd4c1c5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A28 10696 bytes
font_02_sfnt_off000122b9.bin
0103216c4ba2bb2b05de560684aa5b313a36db0c42888af511f704d4a9c12cce
pdf-font-stream PDF embedded font (sfnt) at offset 0x122B9 16304 bytes