Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d7a33d0c281dfb…

MALICIOUS

PDF

90.9 KB Created: 2021-07-07 10:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 63272af41f00a2ef6f8463f14d679ce5 SHA-1: bf5662c6227f070d58df9c88479e27deb2805e30 SHA-256: 16d7a33d0c281dfbe3bdf310751b5a0e7a133023ba946fc10987f285f53566ac
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or downloads. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://www.abcklima.hu//data/editorfile/49186413405.pdf In PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/nabozuti.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd8ad9e004---77118368775.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/giselisajolamafe.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba3f1a2101---44306804263.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d100f37b05---90940429469.pdfIn PDF document text
    • https://atl-50.com/files/file/zipasukup.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a7a9bed1938---kabimuvid.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/kidorojavumujaxobewojol.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/e3a68q992jgjpvl792b8680fb6/gimipuluzez.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/91620861181.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609489c245000---nadugututatuta.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdd28877a5---jevujaxor.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/55391580353.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/6f47ce68790a6bf044a4c4421b3e2c4b/xozobuxajil.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/5jtnnsadcgkscps04hg5hlrncn/27970829415.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/4116850094.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/96900268673.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/dutafulekemuv.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/kojowexeleregiruwamimo.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/dusizuvovobujasum.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/kisosidewedopamu.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076d3797048a---jofodepuzisuri.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/gubesu.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/2i6gcgj3qfgjsqm9b1mtcpc0d3/winomuzesuwisevuti.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/h383k20hcasbsfk2sgeoq1gm7r/rovijebokezoma.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608134a041e06---wepajuposotujorokite.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=red+carpet+2000sPDF 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_off000100e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000118f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F5 17568 bytes
SHA-256: e09738d9d6026ff8afec00e8d199b8bd33e40141087d68b48ed22005e8ddaa9a
font_02_sfnt_off000146a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A8 10432 bytes
SHA-256: ed3d2d8d5948735185886cb362d515f9ee350f59ac796b991bc723d220c9f217

Open this report in the interactive analyzer, or submit your own file for analysis.