Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93afebc5b929adb…

MALICIOUS

PDF

92.2 KB Created: 2021-07-20 04:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ca948c57cf0f1a83cbd494567d3b4ff8 SHA-1: e0be4742711b04a75ca2ba715ad5fc0f9c3c8a69 SHA-256: e93afebc5b929adb83efd3283745c94ea98f694c8a03c3b85d6d2de59763efe9
96 Risk Score

Malware Insights

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

The PDF file contains a link farm hosted on multiple compromised websites, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. These links likely serve as redirects to malicious or phishing content. No scripts were extracted, and the document body was unreadable, but the structure and URL patterns strongly suggest a malicious intent to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 5

  • 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://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1b5f33891---mipuguvutoroxavimame.pdf In PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16098bde3897db---jazibujejogupe.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/mebalonenurukebu.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/05a80a75bc7649e8a4904ad9545bac76/51447568697.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810fbb6b0f0---25634418184.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/vorobosaxagoxafo.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8426cb46a---91516275052.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/8c5f38532076bceb69ffa3a1e92a07c2/40831873225.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607030986e3bf---watojugapexakup.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/milazuwetisa.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/demudizenapezilirigewurav.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160774ada0dcb0---29256415868.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a62428a95c---woseduxovefopewoxawapi.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/e107e4e431bf513ade45b98ea783a424/bojiri.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/4489013783.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/d9bf2d0f6daa5aa5268d6ec1e8fed8a2/koxepizuged.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e0c32ecee---joxasarikebojowuse.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160745899494f8---jesilojoguximunigunegu.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202104/file/fumonaditijav.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073714c35cbc---23184685553.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6djlilnrrkpi7okv8np0ve29e6/xoxego.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/gobufuposu.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726cd263e76---67181152501.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc298ee04b3---zawukukokiromepevaja.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///wujufitife.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=paradise+lost+book+2+charactersPDF 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_off000105ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EE 17112 bytes
SHA-256: 04dad82fe75ca47d57ac45148163bca1b37e10707cada1c87f9b9a27c615f0f0
font_01_sfnt_off00013288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13288 10716 bytes
SHA-256: bea3d7810d30f7a4e816a4a018a989b049977546b8fce379235c00a118adf175
font_02_sfnt_off00014b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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