Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbaf0bbf4e47b017…

MALICIOUS

PDF

86.0 KB Created: 2021-06-22 14:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 562febc8b31c3d9217c3ee8161e08550 SHA-1: 9a1b54ef9b2d66025b332fe2e68f6f3f268971f0 SHA-256: bbaf0bbf4e47b017064bacde62e9448dbaf053e8aad6d66070da3380351ac85b
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised CMS upload storage, suggesting a lure to download a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple links on disposable or compromised hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090fcc970c1d---67565277619.pdf In PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe41a7122d---gulazaperu.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/13585533761.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/5e13d46822d34cc54c43c8bbeaa839d2/lofatiladelunewazos.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160757107d224b---30273487240.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/dudotigavakezajutov.pdfIn PDF document text
    • http://allycatering.com/userfiles/lamino.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc036648ab---76964470351.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/38f0e9lm422s54ujse8jbjrb53/48653853902.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/titaporiboleziwikekanero.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/758ee670ecded191b185badeba64b71f/juvotagonimuzalanu.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fc2c91de3---39706953002.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/4f0fd538136850b197cb52ab358c6073/xezojagoxuruvop.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bdc96046f---zugokakusikir.pdfIn PDF document text
    • http://fygl.net/uploads/file/222057026241.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/8c8a77679a5ecff57c9c4b688c6bde4a/72627381377.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/1a394270955accd76421b975a85a91c6/vurutefuwivaluvigomo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=iptv+smarters+pro+for+tvPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FF 2900 bytes
SHA-256: 884cbfdeb878ee20e2c146b05a1641383b41b88cd86c369d761b3a8bde37f1a2
font_01_sfnt_off0000ed56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED56 5012 bytes
SHA-256: 422879a1ed96939fdb0c22ad6ae213efd1ef400f325c97f9337725945c889dc8
font_02_sfnt_off0000fe47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE47 3896 bytes
SHA-256: 6ddd11cfa4899531a0179179061ee0dae3b4e22cfef63a1ff5eb32bc2270e5c4
font_03_sfnt_off0001086a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086A 13884 bytes
SHA-256: 9ac4fe5f0df7e85fe9e720d5d61e6da5d3b61c7b784f11e76d5183f9e1032920
font_04_sfnt_off000132ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AD 16304 bytes
SHA-256: 8fe31ac2096c5e11ca20e474ac9d4b0e624cd7c6a3d6648e58269b78a2b36287

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