Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0fe567b8f37294…

MALICIOUS

PDF

80.7 KB Created: 2021-09-06 03:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5a718496704acbc2a4fc573d38ef545a SHA-1: ea3a27fd60af106d0db8707b14d58b686cc0d2e5 SHA-256: 5e0fe567b8f37294507aab2bed053ad98dd97ec0fb234a5c3165d02acccf1a9a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/nf14mlofseio17lsh7ctmr8uh8/sewubumalaxakobafebu.pdf In PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021071411253480554.pdfIn PDF document text
    • http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/lajaw.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cb8ed9e8bda---38003758164.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/zawomefipisi.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607635eb28b72---tutalezavirikuragedipalol.pdfIn PDF document text
    • https://inprovitparaguay.com/ckfinder/userfiles/files/bekobakozifopogavobixotij.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/veruxadurolalage.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/6ac30cc14ee0a4550e25afcca84db1d8/46594972911.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfe6851267---81848234271.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/38319986716.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/tigijisalisalemixozavojam.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/v1o23borh0auqk69s8k77vk15o/mugupuravefuxomijoz.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/p8q136m4j8am8iuufcmrp52fm2/makoxoti.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3e21cabc1---kolukewimazil.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/60756095097.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/4e7c2c37aef162a73e810dc42b9f6ff2/gijenobonifadiduwuvazibi.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/0c86f8d21af472d84228f6517a6831ee/genuzazazamema.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/1ve4kpg7q5hja6ou95prp1jrf1/tefedage.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/bojijetadanipuxogezesisa.pdfIn PDF document text
    • https://icbacademy.com/upload/files/9617286767.pdfIn PDF document text
    • http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/lufibepirorarixoxata.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/bozifeva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=chart+of+accounts+sample+for+service+business+pdfPDF 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_off0000d4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FE 18140 bytes
SHA-256: fc92d94f0f2eaa017d7aaf827d36c097b43877221f774b586cfdbc1bb089a8e8
font_01_sfnt_off0001031d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031D 11220 bytes
SHA-256: ef58a8edc6de6ca8d1c22d8fe6908c274bca7047c81b05d934809c456d42285b
font_02_sfnt_off00011d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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