Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e237de99ffffc4…

MALICIOUS

PDF

84.9 KB Created: 2021-06-10 05:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4d70b4bb2998e4f1c8b85bb5fa935316 SHA-1: dc9169ce942b963d3e54a4bf6653823df515d797 SHA-256: 73e237de99ffffc41fdd61eadbb9243f706b18e27930610abe138741403d2e33
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to trick users into downloading malicious software disguised as cracked software. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://wastran.ru/uplcv?utm_term=aurora+3d+animation+maker+full+version+free+download+with+crack PDF link annotation
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7ba3efc1e---mijamo.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160810b9fbc4fc---57803573532.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/8d09tgq0l3eb20r2rsbma61llu/58564528507.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a20bacd78---40213397873.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/79ca77472e7c07844202764d246df4c4/latajovax.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073b39f19b63---40811594128.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/s298q4d37r7qllt8tep5gpm4f3/20775584866.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/48d3f9b205a7155897773e5847fec291/69716378794.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92c7433296---zudidijowegelasi.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/5a3dba084ae0772def203ac2307b52d4/mekerazete.pdfIn PDF document text
    • http://erfaspot.com/resimler/files/wefirimatusoludobogikemit.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e24baeb89---54465052542.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/9857477366.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b31c72a3d8e---56876856607.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/zudavulutij.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/sepasewurow.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/fr972n73tto8k9e2ia98psv075/nazeraxapedinetiwage.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file/%5C/nidanupejusetusakog.pdfIn PDF document text
    • http://sport-way.ru/img/file/57278742659.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80B 5628 bytes
SHA-256: 48be2dcb878a919edaee6894263e9c274a033a70bde66749535de269f3618beb
font_01_sfnt_off00010b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1A 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000113a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A8 21772 bytes
SHA-256: 3dede013242501a41677c6f451d85df41ff2ddbd44548cd28a6844cbe30171d8

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