Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab5d1f6da6604c6…

MALICIOUS

PDF

101.5 KB Created: 2021-09-22 22:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 598a6593f973cadf51846951c1b1900c SHA-1: 49b7c35fee4e5146726dcab451504da52ec41058 SHA-256: fab5d1f6da6604c66ef996c73f3f0b6075927164ae6ea0b4ddd80cbb9f2e5ffd
154 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of numerous links on potentially compromised or disposable hosting suggests an attempt to obscure the final destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9111

Heuristics 5

  • 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
  • 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://studioindelicato.com/userfiles/files/73809625261.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/baqd5d51qfq34q6cae09eo15es/13015291982.pdf
    • http://ldkxzzs.com/images/userfiles/file/88629145827.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/b6d8f05773115d28483baad7e430a09c/faxirokipivon.pdf
    • http://yourbuilding.ru/userfiles/files/rukuwodefajuwom.pdf
    • http://nuovojob.com/userfiles/files/3378735896.pdf
    • http://interstroy96.ru/uploads/files/xabedir.pdf
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/18943201935.pdf
    • http://hepiran.com/cache/fck_files/file/30756320236.pdf
    • http://cmsrecuperocrediti.it/images/file/luvobekuw.pdf
    • http://lanaecoloridabruzzo.it/userfiles/file/67092567741.pdf
    • https://kabelkyaobuv.sk/editor_uploads/files/xinonupetaxujuligakajafu.pdf
    • https://middletonchambers.com/ckfinder/userfiles/files/topofi.pdf
    • https://lodoshosting.com/calisma2/files/uploads/38324950999.pdf
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/79901746294.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142d0180a57a---sedixutalizufodudigef.pdf
    • http://france-ex.com/images/blog/file/zesagejefivizi.pdf
    • http://zhengfutz.com/v15/Upload/file/202191949426174.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4ccbd90d7---34452125608.pdf
    • http://naturpix.ch/cmsimages/file/gusegipum.pdf
    • http://tearose-kitchen.com/sites/default/files/images/imcefile/30180643419.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=super+mario+64+j
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000158b1.bin
d749d002ec2904b5e01eec281482abcea6330f5997913de82a1fd488245f16d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158B1 19432 bytes

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