Malicious PDF — malware analysis report

Static analysis result for SHA-256 6690d04b93c48e5a…

MALICIOUS

PDF

160.7 KB Created: 2021-07-02 20:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 89b3a16e57fc69b9bfcd5a127e211129 SHA-1: 8f81d173e4298b7f9a83b2332e0291a90510463d SHA-256: 6690d04b93c48e5a36136301ed42c0e6ff83de09d6a61fa07440b5ee7dc73abb
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to lure users into downloading further malicious content or falling victim to phishing attempts. The presence of multiple links on disposable hosting and compromised CMS upload storage reinforces its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

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://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/eea5e335f394f9515de551ad1f1fecbe/54572257535.pdf In PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f83b2449c---jelidutuguwaxorana.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/4a52f14dd61aa0e1d09f19ebca15ab7a/48446184038.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/s6sbi019mpi4fsvrhvoc2fggdr/58752452382.pdfIn PDF document text
    • http://minhvuongthuphap.com/upload/ck/files/49604193948.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0e5b8d433---lexodazixajebe.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722f9a28585---28438433261.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3347314535.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/92949165348.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc26298fdb---59398367520.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/kegobedu.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/nld1mpiq67aa5s8j5dvqepp8a6/burenijunafefaludizolidax.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/xupujulazodafepelo.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/0f2d04adf169ffe23bf326ca8e413e7b/wanidesuvegixekig.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868b70104d5---bevasomixumolotutije.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/ba6f8aa9e7c3c812563633b5a2840319/fajirimuxekizifaroteweni.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/30903349966.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/58866149512.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087057379612---mowegisiboxemudukagofoji.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/s6uiepu6d0homheegb21gqbvu8/towelemimifef.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/28584170907.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0772d026a---60970015792.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/fb7b85b59579d50c793a4ebaae477dae/26813623009.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c96da2705b6---goloduwiwigagezuzokun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=explain+the+role+of+monetary+and+fiscal+policy+in+causing+and+ending+hyperinflationPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20661 23832 bytes
SHA-256: f4c1b5873f2be83706eab4632ccfe6801ffb55a84e039fb6ec336a23799568d7
font_01_sfnt_off000241b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x241B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000259cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x259CF 11368 bytes
SHA-256: 7e246f02f3052bbeb9678eb29b3e12f06fa87db34f717b0e22dfea645af5812e

Open this report in the interactive analyzer, or submit your own file for analysis.