Malicious PDF — malware analysis report

Static analysis result for SHA-256 e36c26c34636853c…

MALICIOUS

PDF

203.0 KB Created: 2021-06-28 03:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9767b7ebedc8a1f82fc2560feb4fc890 SHA-1: 758f8b22c63dbb0d10b8388085fb689027a2bbf1 SHA-256: e36c26c34636853ca0b4a44c1d1f56dac9d8a9f227de24be140af08f19ba5df3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous links to compromised WordPress sites, suggesting it is used to redirect users to potentially malicious content or phishing pages. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 5

  • 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.
  • 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://catamma.ru/uplcv?utm_term=springs+and+neaps
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b792b99e4cb---susewegoziverimujimadi.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078d2365a1b3---raxebuxawus.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f339f731f3---nufamiluwokefowurejaxuvol.pdf
    • http://sosnovgeo.ru/userfiles/file/19314132981.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/atplmpsb61r1ss01ugcjc7noka/pojibivoletogazi.pdf
    • https://plagij.at/ckfinder/userfiles/files/13304210512.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8f6c95da0---53241269319.pdf
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/bukinuvuzireviwor.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/1b69f35f8c72025ecd61e515139a2e98/93919490773.pdf
    • http://arci-mp.fr/admin/File/gomugokam.pdf
    • http://tunglamgarden.com/images/fck/file/86113671480.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609688d0f311c---tusonetonedimudiwezosul.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/d70b567451d7b89e060adcf5e63391c1/36088964075.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/fhqa50kf7glmqvnqa5vn46qu48/xazobedaxopasixuvinavok.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/134ac2b63a68e49eb871556be5cf2fc0/wuniditinawasetevutimudob.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088e50aabfc6---18685911285.pdf
    • https://acgroupenterprise.com/userfiles/file/77607988820.pdf
    • http://chanakyaaerospacedefence.com/userfiles/file/gedifasavowexatutaji.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a29dead8c5f---tipowa.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/tavi78vk3hlpq0n864if3l8uj7/fowimozamig.pdf
    • http://muzeumostrowiec.pl/obrazy/file/52377297815.pdf
    • http://93564497.com/userfiles/4051234565.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/i1n74fvl0ar31lrv1935qahlv7/fojonumokebipuw.pdf
    • http://msiutilities.biz/documents/9909324224.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_off0002bba0.bin
56ecb9a3ebe8af08cf887e86501d8ff85f05e47a799737f514d5e66b77302609		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBA0 18632 bytes
font_01_sfnt_off0002ed30.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED30 16792 bytes
font_02_sfnt_off00030547.bin
44d9291ef07f4b6905533485a703caf195e1a21351d5a60ae29a7a0c40637ae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30547 10380 bytes

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