Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d59d8e9ba6fd710…

MALICIOUS

PDF

85.0 KB Created: 2021-06-29 05:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 57f58a2b533b25cda1076b06ae47a537 SHA-1: e3c792121d6bb172818bb482e47ac5d8f5adc3e9 SHA-256: 8d59d8e9ba6fd71038e8b3afe91d0214b89ba8eb01d19535ac63a8f77b030a2b
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078443ecec3e---minuxugizenusutitom.pdf
    • http://centralgiving.com/media/userfiles/file/lugibafud.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/mdt58ochm156ack1k9qjt08rv6/nomefujuxamufujuraza.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/2a5c6944401d3dda32e369c333283f6e/mijejowavupujaritetamo.pdf
    • http://atthaya.com/file_media/file_image/file/60510852325.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d57b60db4---penamifonomajawakoxuzile.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4e7ed69c2---venugoxuzexunaguxexe.pdf
    • https://rumputhijau.com/contents//files/11838268196.pdf
    • https://stmarys-perthamboy.com/upload/File/xuwobew.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bddb174320f---kabebafuw.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607074d47615e---nikuvixesodudolamig.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085e74aea1fe---14111099278.pdf
    • https://ddshower.com/ckfinder/userfiles/files/99051328135.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d61fe61b8---51647377897.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/8e8682771fc9c3d1af3f34c933a94d7a/bipixusepigeminazisifin.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/42b8a0ac54f283dab5ea368469e4bc38/40001385165.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160701deda2961---deroxaxebuzu.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093127734032---95903797630.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093dce9f28ec---18670635008.pdf
    • http://aquatrustfina.com/userfiles/file/jobeguvategufo.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cebd4ef1a---84184865929.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8487da374cda0f974ad283b1d1b994a5/zutunukiditojovezabile.pdf
    • https://bakwanudang.com/contents//files/21011793793.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b074b41e753---53023795379.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=come+to+terms+thesaurus
    • 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_off0000efa8.bin
4d7157d1f6bb0b63e573a8e3b4c8b14932676be00d14b494134a1d516ee8d5df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA8 15524 bytes
font_01_sfnt_off0001177e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1177E 16792 bytes
font_02_sfnt_off00012f95.bin
2b27f6355a9e7ec1cc46e937deaee24c6a3f5871a6a96976a9c23a89e7914571		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F95 10264 bytes

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