Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e684125c95c820…

MALICIOUS

PDF

85.8 KB Created: 2021-09-22 09:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d4637f4a8b4f16a42af6f0ec59d206c6 SHA-1: 01f640170e093ddb29eefb2bef0fd6da450de218 SHA-256: b7e684125c95c820dff3362e1d0d5d8c44a4f083cf9eaec01f0b873574ec51d5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also functions as a link farm, directing users to multiple external URLs hosted on compromised or disposable domains. These URLs likely serve as landing pages for phishing attacks or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613c033bb8493---xamegode.pdf In PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/64495223108.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d1222a44a---93853888260.pdfIn PDF document text
    • https://blokhol.com/upload/files/tuwafatomidubefabe.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-9-1/20210901183255435820.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/dikemedovetetipez.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/15510641459.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/lokujudaxegebamik.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/13026494228.pdfIn PDF document text
    • http://savytrading.com/userfiles/file/45883731550.pdfIn PDF document text
    • https://sintasyapi.com/img/userfiles/file/84647872684.pdfIn PDF document text
    • http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/jimodavimamamipoberow.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/lakileg.pdfIn PDF document text
    • http://citysoupsbellevue.com/uploads/files/nidivovitumufitaforomi.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///25297955909.pdfIn PDF document text
    • https://clic-essc.ch/ck/ckfinder/userfiles/files/lufusurod.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/gabediniresetigofaki.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/72451930772.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/2371496837.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161454db341c05---zuseg.pdfIn PDF document text
    • http://wdnederland.nl/file/xevubitaba.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/57895424346.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/nemixe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=justice+league+ppssppPDF 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_off0000e1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EA 1736 bytes
SHA-256: 05448141402c4a4d028bfb162d9e13c55e2f78da674f221b73fdb5e281de01af
font_01_sfnt_off0000ea2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2B 18280 bytes
SHA-256: f7859c738bde66faad36dcff347e83e077bc9c0c9e39d700df88a3c2e65cf560
font_02_sfnt_off00011a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13246 10316 bytes
SHA-256: bba401924c5563e7dd1f9d512a87f6f171fccb53154a05a6287156ad58168b44

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