Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c888567187aade…

MALICIOUS

PDF

88.8 KB Created: 2021-06-29 22:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd6b3744398668218b9e7edcd29ea420 SHA-1: 6d9c25a0e5388f769154e38d0066b69f23109fc0 SHA-256: 09c888567187aadefbdc75faed7dfcfa10c4ec7075457db5f65dddacbb0d63cf
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload storage and disposable hosting. This suggests the document's primary purpose is to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lt101shop.com/userfiles/files/zulesujexuxidodujawene.pdf
    • http://hmconcretemixingplant.ru/d/files/musifawijalawejojise.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/11fcf14cb6bf7f732b779202ba3d7730/weliweguwigologaditagoki.pdf
    • https://marljivo.hr/userfiles/file/96143306755.pdf
    • http://safeabortionnepal.com/userfiles/file/jegolumibure.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/3ftaaqci8nq4cucfurpb8cs10e/11523699306.pdf
    • http://ya-ke.cn/admin/upload/mukiguxugaful.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d31dd25d2---90368263732.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/3f4f161a005b4e954c1034717303019c/tukezeripare.pdf
    • http://trendybiz.in/usersfiles/file/befotaxuzaderalaweviduvik.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/jbphc1dkd9p88n45lcguiltvun/64836959024.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841c3d4d791---rebevuzuni.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/78f14243cb05c981e88483a660006776/3176023407.pdf
    • http://labonscafe.com/userfiles/difubufononeveg.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/letl9cp1t9lgnre26tpo6kltq1/fapelodebosa.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/e5se41gv3hua0thd6c7if7pa75/jevarulin.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/n6ks25u4k5l02g7o7jd45ker2h/73233027797.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d7c6620f2---buzukuzobuwekinupinokades.pdf
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c49288ad4---puwigi.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e66f41a1c---vegobajatag.pdf
    • http://evergladesharvesting.com/ckfinder/userfiles/files/25035721021.pdf
    • http://espacioschillout.es/images/admin/file/bofudavoz.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/18c1b194df13357d2209492554052475/nuwaxobonodobuwizakido.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=aka+also+known+as
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c914.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC914 16792 bytes
font_01_sfnt_off0000e126.bin
12c25eaa8b5ef2f8b9f474b0f1ac53bf3b082128ae401e1df201a341010d0570		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE126 19096 bytes
font_02_sfnt_off00011403.bin
cb50cd85a8fd458b547aab17e86d00a66af669ffc08f2df7147c00a1744f2f91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11403 13552 bytes
font_03_sfnt_off00013da8.bin
e769567891d0525b8c66b7939fac9c134edb484ebbff38a7a22d1b148fec92aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA8 9840 bytes

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