Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce26391ff286952d…

MALICIOUS

PDF

79.0 KB Created: 2021-09-09 11:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 194569306605a70a6b329777dae6a3d6 SHA-1: 3008f5cab4bdabcde66b4c590fd791608aa760b5 SHA-256: ce26391ff286952de963331d52b52ba9e0ce9d2153bb710bfef286e9e5976237
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. ClamAV identified this file as 'Pdf.Phishing.Trojan', indicating a malicious intent to lure users to potentially harmful sites. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://salukool.ee/upload/userfiles/file/75396500503.pdf In PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f62f71c942---nazosikimowowatitivafata.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/4e19a0019142e582581433c171612adc/wopefeweruwefo.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/90264551716.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/22474671435.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/xakovadakerefumiwi.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/wumolobinakewugemefapeb.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/97617051971.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/83015980673.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/10016528951.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/9g3cv9m4lfp37uludchmr952q0/42548829116.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e4e4bbbff---50319866325.pdfIn PDF document text
    • https://trongtrucsolution.com/uploads/files/rutiritikijoxin.pdfIn PDF document text
    • https://r4binsh4h9-att.com/contents/files/miset.pdfIn PDF document text
    • https://essuances.com/ckfinder/userfiles/files/79738828274.pdfIn PDF document text
    • http://vntattoosupply.net/uploads/image/files/rozixofajuvalep.pdfIn PDF document text
    • https://dtd.com.pk/ckfinder/userfiles/files/tilorinotilonovetizaderu.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/87099247368.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/motajutabadade.pdfIn PDF document text
    • https://ysh.my/userfiles/file/nimirimerarimomeze.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/kumabewanusagisobipino.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a9c189bdb---bunuvabawevizarufezofes.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/suvixinigaribox.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/girelipifuvoluxelijir.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/6gt7jn0p568tq3mvenbvi0vhhj/ropazi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=video+combiner+app+for+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF178 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001098f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098F 10576 bytes
SHA-256: dc74d17baabbd5abc370d2ece3465093e7986ab2826a94f36c28123fdda23cfb