Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d47270d2a3ab22…

MALICIOUS

PDF

93.8 KB Created: 2021-07-07 05:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ae33a7e71716bb579f6a29046d3fa268 SHA-1: 3691ada8d9439873fbb772651568e79000ec04dc SHA-256: d1d47270d2a3ab2260a79e706be8eecd64ca32b8c69469a63788f540e7f030c1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate the document is designed as a link farm, pointing to numerous URLs hosted on potentially compromised or disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://garglob.ru/uplcv?utm_term=premiere+pro+what+format+to+export PDF link annotation
    • http://creativetechno.in/userfiles/file/kuweba.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/pilojemilewovuneko.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/4npb5gdempjh146qgq8ocmgi14/guvagogexarafitegidivipez.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/ji13ohbpvho9gao1306qnraoq7/gajixoxivogo.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160919665c138c---33834720939.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/nagimitegixujalejesosaf.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/6264e79f48ebe5ee4fa419ccfcb4b916/dukoju.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/cde4430f1680c60878d4e33eab335483/37483709893.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210616092049.pdfIn PDF document text
    • http://lafayetteconnections.com/clients/52818/File/telubofujugemorijeroxe.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16074cd091a6bb---jadekotuxibutoruzeni.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/31754253684.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160908c94dcec8---nusixebebi.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f9f74fb85---midopoj.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/66152317484.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/54301312.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1623178696jafekamiwobufuwowuj.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/9601384191.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/15792485787.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/bupelujaredigiwogeb.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/89620611953.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D92 10492 bytes
SHA-256: 4d54d92164c47bb71c7378cda5a36857f95d879f7cc903e2b38f3ffba9745ed7
font_01_sfnt_off0001257b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257B 17236 bytes
SHA-256: 8c929f6b05c3872db942f88cbad6484dbd468d9bb5ebf6d72c3776d77a2e6005
font_02_sfnt_off00015249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15249 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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