Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4721075629b35f…

MALICIOUS

PDF

148.1 KB Created: 2021-07-03 06:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: a84a9eec2e85b71209bf7227bf2a20ce SHA-1: 2070cb3ccc7db78eb6675c5c62f565e974389337 SHA-256: ea4721075629b35fca8319f340059aaa692e8bfb0fcfa2de3ca4af8c446f3659
256 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which appear to be compromised or disposable hosting. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's content likely prompts the user to provide sensitive recovery information, such as private keys or passwords. This, combined with the 'SE_PASSWORD_ARCHIVE_LURE' heuristic, suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9742

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.puhito.hu/uploads/94214197762.pdf In PDF document text
    • http://navigator-nsk.ru/userfiles/file/74305319871.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/7q6m76pdq8qd54javl0lqpbb92/vupipenis.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210619065028.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/jasovuwurototuposafukapis.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/kubosulire.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098d6a9beb25---10418017558.pdfIn PDF document text
    • https://computerzone.pk/file/xafemupiza.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160709e13a6053---39854288617.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a08944a6aec---90817860483.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/pp1lq12hjd6958k3avup36qe3n/tanetuwupize.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1e8e9caa9---38046535897.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/5799352716.pdfIn PDF document text
    • http://rahway1968.com/clients/5/53/53e48f2724afc57738bbbcfbfdbdad27/File/jolipede.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/9db8858ec8a57d5351f9dbf98815a6b2/94436740068.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1606f74a77ae1f---11832738625.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/c72caea18db368899205adee0b527a60/18448334346.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/dizipavofipufokarezolita.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/83014571070.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/bedb6a07a6cb621aaf31a1dd5b532a07/ruzerofifumutuzepo.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/q637ns4p9aee73hct6qpgf4bom/61754750007.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/likokaxijalo.pdfIn PDF document text
    • https://media-get.com/userfiles/files/sabanekiza.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/wuzanew.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/vubebuwubumikunipemi.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/3397572107.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/fatuwimojedojepevidewuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=rotate+view+pdf+and+savePDF 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_off0001e4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E4B4 17380 bytes
SHA-256: e36d589077d26af50870a58d620cb96f6c8347ed0de89e38cfcd7dfed7686d94
font_01_sfnt_off0002123b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2123B 10540 bytes
SHA-256: 6880d242efd2e1dd42b163e5fd451147f2533524c7521c195e558bbb3dfe580b
font_02_sfnt_off00022a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22A7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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