Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f0e5d54ed200f8…

MALICIOUS

PDF

84.5 KB Created: 2021-08-11 11:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e1b68bcd3e21dc1ee2483c120b194e7a SHA-1: 0f7b68c952d2b5dd04785de1f9097328fabc5591 SHA-256: 93f0e5d54ed200f8cae52254eef3248856afcc4a426b97d7070612033e2ef778
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The document body was unreadable, but the presence of numerous external links strongly supports the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/1bc58eaa0ea61521b82e2c00fa59abf8/lomojanekokiz.pdf In PDF document text
    • https://icoachyou.biz/images/ckeditor/files/vegavavoferevazen.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/sofurirow.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/24992519972.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf56e4416f---40738618332.pdfIn PDF document text
    • http://strap.sk/uploads/files/lejudefuworilug.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/tikureduwituweju.pdfIn PDF document text
    • http://nicosiacaffe.it/file/73836854966.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/36448129115.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/31734772424.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/3818023870.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/28843615322.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea1611471a---50325665980.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/ralig.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc0e701974---30166764223.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160ae09fd38b04---4277937171.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/doea00t1sh7q4kuo33k0m2hlh9/donofomujo.pdfIn PDF document text
    • http://smith-williamssisters.com/clients/d/dd/dd6cbc7353a6ef31c13ccaa63ab862ac/File/71764293938.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/360faf0c53a4d000d3997925334811d1/xipojigugeso.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/88271429715.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/e0e3cbe026afff5dcd5be76adf4a46d6/76340446048.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/bokazefiwisikumofosa.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/uuu8vp0l5mhm3k7gg79qsr61cj/napegarenesil.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/mazufozusazet.pdfIn PDF document text
    • https://menu2uplus.com/images/file/11569906791.pdfIn PDF document text
    • http://dmhfamilyreunion.com/clients/4/44/44eff64e497b984d8b2945277059c9c0/File/27041005289.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/zanodukizarele.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+read+digital+water+meter+for+leakPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/8dfa60ecda0b2ba77427e466887cf476/xutewazawolujozavadoji.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE15 10596 bytes
SHA-256: a64a156d469f709affbb6dbcf53765f641791749ab847fdeda28d6d6c95e0130
font_02_sfnt_off00011613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11613 18028 bytes
SHA-256: 72ab33e3986b36c02ecd6a4c2fd6428ada41c4c6deff193bb10331a7667271c2

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