Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0aca63a05b73c5…

MALICIOUS

PDF

106.3 KB Created: 2021-09-24 12:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cdee18b9f1e59cdc0d979ce4e219d950 SHA-1: 47224cba0cf1572fe1b9b3693bd5a9c4635213e7 SHA-256: 7f0aca63a05b73c5717da0c5876c38a962606df39b7a3703d5b55397c458427a
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides instructions to decrypt a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://diversecityuk.com/userfiles/file/46719628140.pdf
    • https://dailyhondaotomientay.com/upload/files/duwedekibuvizol.pdf
    • http://pastadimatteo.com/ckfinder/userfiles/files/fovosufaxoxu.pdf
    • http://vxclouds.com/userfiles/file/90197699723.pdf
    • http://aow.infogestnet.it/ckfinder/userfiles/files/silutobopebilorixisi.pdf
    • https://ovistar-dz.com/ckfinder/userfiles/files/28664002552.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b0719668f---95499404476.pdf
    • http://chickenwild.com/upload/contents/images/images/67725206829.pdf
    • https://frenstravel.com/assets/ckfinder/userfiles/files/xejavirevetowes.pdf
    • https://hotelangela.hu/userfiles/file/figiwewemisag.pdf
    • http://chornakorn-packing.com/ckfinder/userfiles/files/larebemufipekeweposivubo.pdf
    • https://myclubowners.travelenvogue.com/userfiles/files/5102249329.pdf
    • http://bratislava.topenglish.sk/app/webroot/gallery/files/mutelibawimileli.pdf
    • http://fd-health.com/upload/ckeditor/files/pakebabuniredekubozon.pdf
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/18961995664.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148c10ba3ff2---mekasizese.pdf
    • http://wawabed.pl/uploads/userfiles/file/81128415017.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614882ff70170---57520116861.pdf
    • http://kryotherapie.net/neu/userfiles/file/bakutoponet.pdf
    • http://leylatoprak.com/userfiles/file/vofutegekikiwojobofezor.pdf
    • http://lauraestetica.com/userfiles/files/75673920946.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/161449c0180ee7---rawafijupixeritubixuzena.pdf
    • http://madmojo.com/fckupload/file/dunovudasiw.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1613f03da7dfb7---wosopejorogivepetomovaw.pdf
    • http://problemconsulting.com/img/download/files/siremepunusegusinisakixeb.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=harry+potter+and+the+deathly+hallows+part+1+full+movie+in+tamil+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013194.bin
361fc6d2bccdc765ad1e96497677bd8989479fc1db8d28f4f8223d71156048c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13194 11172 bytes
font_01_sfnt_off00014b96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B96 16792 bytes
font_02_sfnt_off000163a8.bin
158ad59b55a94a913bbdab85ec61fe899c609d69a3f4260b05fbf9ab95c444b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x163A8 20632 bytes