Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed3cb2ded4de9c0…

MALICIOUS

PDF

103.0 KB Created: 2021-09-05 23:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 69e678ff871376bd4359efaee897bdd7 SHA-1: 5075050c91645b6edaaf3ce342fead3e0e3ffd30 SHA-256: 7ed3cb2ded4de9c089942662885f2bf937af162b62243aac4fbde8e7975dee2b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9349

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 http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6641be6a22---saxidunusogasovuzitas.pdf In PDF document text
    • http://www.pranabkumar.com/fckimages/file/44380229973.pdfIn PDF document text
    • https://shiphangnhanh.net/uploads/image/files/26994025295.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/lobabelegudutilidur.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/rilerokekugolujoluvu.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d111e0f7f6---4055670520.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/28630276068.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/alcrgd1onnscesk4bik0jaaok7/92436181587.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/0f3f4e49fe4e046e627d2a6936c3341a/buwizope.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/kimebena.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/49162292808.pdfIn PDF document text
    • http://drlalashow.com/php/billboard/uploads/file/lagunorijenotedojuwated.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/f02a84642cd77accf6379feb78c9269f/88788374057.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c27f4b76dd3---46100472878.pdfIn PDF document text
    • http://savannahcentury.info/clients/4/44/449a5b3489ef279447e90cf6cdd72f1c/File/libil.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/97585551197.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/popis.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/46045502218.pdfIn PDF document text
    • http://www.ipkameralari24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9dd115485---febeginisinovavifaf.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94df42f1e3---47671015003.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/578f5a0638efc24b5570412cfda2c5e5/39327410518.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/gipoladubep.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/ab9c651de94bfb7d12c3eaf2673d82dd/65606808637.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/42590177952.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/sikimalifopelobaf.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f385eefb1---liponanerujenovelawav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=nzxt+kraken+x62+manual+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11094 10896 bytes
SHA-256: d3343d4319c2a7183763a1c0d3afd0403475600d919105dccf9cb6414417946e
font_02_sfnt_off000129e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E7 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_03_sfnt_off000131de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131DE 16180 bytes
SHA-256: 6715c95098aaa9f0b3e3d1e70addc6437ba9369fc5f08e34520566c381065eb2
font_04_sfnt_off00014795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14795 27240 bytes
SHA-256: fb7ea701afbed072ff668ba1e6d77f613b129fe8999b5938845fab0ce0eefbd8

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