Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d018a609a7840d…

MALICIOUS

PDF

120.3 KB Created: 2021-08-10 05:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6c9a69b196564d033a814ba0ab42f434 SHA-1: 008535f17f0de131746f346c58cbd4116e9c8e84 SHA-256: 98d018a609a7840d7d15926740fffddc807018df01f1a3b0cb76c3662e7b1fa0
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised or disposable hosting domains, suggesting an attempt to lure users to malicious sites. The presence of multiple PDF link farm heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://barcelonasixtytwo.com/userfiles/file/56864448264.pdf In PDF document text
    • http://babamoleskine.com/files/file/58899740459.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160cb74af93d3f---selizarokejumuxegezika.pdfIn PDF document text
    • https://htchninc.com/d/files/jevaxefamobutobe.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/d6a122fb5d69879f31bc4ed128d7a057/newino.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f918f90525---75933140885.pdfIn PDF document text
    • https://abrasco.org.br/ckfinder/userfiles/files/werevakejakifob.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160ace3a8c5afb---98656959160.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/sagekujurozosafisatiz.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/27042816112.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/tmlqr3rf01vvttnvdp2qh7c1j3/76761869334.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210630141329.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/tuzerusepupopowexote.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3d0e7404f---zemibotikujimigemo.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/384df7b1dbe1cf56d6e353f7cb513759/nowafadowopam.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/ho1dhq1puk95scrrac2m3nhvqd/jetopa.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/49d7c8d74273f8415536da72699cf914/befof.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/refulutagef.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c28a2c7a55f---44202699088.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/dobogorogu.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/55071467681.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/jafupotox.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/d75eaaa12e33f5c9133c0c9fd37a9005/41984873866.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+get+a+proxy+vote+for+general+electionPDF 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_off000172f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172F1 10844 bytes
SHA-256: 70a6f7a621d263bd9347dcc27186b31294fef5a12dd0229a092288dcafe399d8
font_01_sfnt_off00018c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C25 18176 bytes
SHA-256: 7b33a64a1fcb74a394aad37a6d601d994a14b65c1efa9b16b8c814b36b672b02
font_02_sfnt_off0001bafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BAFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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