Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee06e16fab3a3a22…

MALICIOUS

PDF

95.9 KB Created: 2021-07-23 22:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4867ad7a918109dfb37ec8e9829bcf7e SHA-1: 718678c5efe122762b0a5ff74d88bccb694fe3eb SHA-256: ee06e16fab3a3a220dfb7ded5c8726e50b92c60f55b2fcca09d0d5ec2f4e85ad
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to compromised resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160a288d4211fa---87520171177.pdf In PDF document text
    • http://bettaletroom.com/file_media/file_image/file/febotozefewekaxo.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/o3ejij6u6d697772s1r5rpj854/nemejidizo.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/judubopekibodulajav.pdfIn PDF document text
    • http://klpa.net/userData/board/file/56858274577.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/4843f0e3ed8f8d363ed0dcc4e6ccf8fe/8707169479.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c916a695a18---92416401641.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6407229555---71921680859.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/1238151128.pdfIn PDF document text
    • http://vieclamquantri.net/upload/files/58784098501.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d6e9f08de---kafotevijogozawevonagefi.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8f5b76e72---14807651379.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/tipasujewotisugodoxewo.pdfIn PDF document text
    • http://learningkey.org/userfiles/90357217688.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/86698914416.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc00ad0c9a---mopewukinejifu.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/raxituzerurekemokugawes.pdfIn PDF document text
    • http://painttechvina.com/webroot/img/files/nitulorekawipo.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/xoninutomofisumigubimokig.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/lesibunujapidonuxalid.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/bozoxasap.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/49846890530.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=frases+celebres+del+amor+en+tiempos+de+c%C3%B3leraPDF link annotation
    • 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9A 10932 bytes
SHA-256: 8e172dd717b7395cbaf80f8ca24d3a181bbcbafafbc1e796f9f5e4a15e1049e9
font_01_sfnt_off0001145f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145F 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_02_sfnt_off000129d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D7 17844 bytes
SHA-256: 0e03069efff083a212cceb5e1ede1daa5096b6c83fd527daa2b9b5769c25ad3c
font_03_sfnt_off00015717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15717 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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