Malicious PDF — malware analysis report

Static analysis result for SHA-256 72213180c5c02d1a…

MALICIOUS

PDF

90.0 KB Created: 2021-09-02 19:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 911ce591496ebdd70240e93a32755538 SHA-1: 14feae48942adf246243c183cf301d5def914bec SHA-256: 72213180c5c02d1af0bd52b4882dde03d5332bc3d8575ead572dfefbc65c99f5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to various PDF files hosted on disposable domains, a common tactic for phishing or malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a method to evade gateway scanning. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

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
  • 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://guides2alpes.org/uploads/file/tukaxolavelepijutidorarer.pdf In PDF document text
    • http://pneusmarene.it/images/file/kazexefomejaz.pdfIn PDF document text
    • http://unionnutritech.com/upload/files/25662423624.pdfIn PDF document text
    • https://strategie-forex.com/ckfinder/userfiles/files/kogedisabofomarowuzuvete.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/36544013759.pdfIn PDF document text
    • https://upaspor.com/resimler/files/35841248117.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/eaa08a1b995f2a8ff39ba5f0e39082f5/jawonuxolifap.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16070621116bdf---77364275709.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/91138059180.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714fb669118---kigazojanavasofaba.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/55896104871.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/4469ca950402f0f4ce3851cfa8e425ad/dokixorugewaweze.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/77676617241.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/53133599616.pdfIn PDF document text
    • https://lecourbe.dk/userfiles/file/14529435026.pdfIn PDF document text
    • http://damoorefamilyreunion.com/clients/7/71/71c8bb141a0941b69292984b9770a174/File/xikaf.pdfIn PDF document text
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/tosinawikurululewuzuk.pdfIn PDF document text
    • https://oversaslogistica.it/file/77818030751.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/ridubuvufelogajojanafos.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/fupimoziserinikusowora.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160723991711bf---67494602226.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/tdjri6v3efepvq6pv948qqp73t/74894503909.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/c05063c2729aaf1fc2fe3960a8438a4b/66621119357.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/bikegudat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=dictionnaire+m%C3%A9dical+fran%C3%A7ais+arabe+gratuit+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_off0000ceeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEB 11556 bytes
SHA-256: 2a7b1a7bf0ba51c54182c25ef50dc0fb24459adda83e418663d896305bfcf1e4
font_01_sfnt_off0000e94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001015d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015D 16148 bytes
SHA-256: 1c024217ce21bb66922f73502146d3c7616b47413e2e194c36dd680b30e64e78
font_03_sfnt_off000116e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E5 22020 bytes
SHA-256: b0ec2548c85528e12ac731b048e22f7f4985177c27bf409a8a2f2781b091165a
font_04_sfnt_off00014ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DDB 1888 bytes
SHA-256: 228445a3744f13af4bf84041e55802a923554d86926eb0745489ea117e4ab105

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