Malicious PDF — malware analysis report

Static analysis result for SHA-256 25cc614224cd6d6c…

MALICIOUS

PDF

64.0 KB Created: 2021-07-03 08:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c18c4b827269dbe948471a99e228f3b8 SHA-1: 69aaaf11fa451720cc1aafa8695b6c7fc8fd69f4 SHA-256: 25cc614224cd6d6c282b12caa1cfd76d7eb0a461d56bc194a877169452d77d22
154 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple external URLs, many hosted on compromised CMS uploads. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of numerous links on potentially compromised sites suggests an attempt to distribute phishing content or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9183

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 https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/htf8cavnao0doan2n2t7khigkh/maxik.pdf
    • http://bestbelly.org/content/files/files/96115846374.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/7b7d1bea15de67eabdec365e73c7ae85/55756995738.pdf
    • https://resonanceacteurs.nl/userfiles/file/84492476555.pdf
    • http://ddgasul.com/userfiles/file/91094325734.pdf
    • https://nikosdimos.gr/userfiles/file/kagonupafexobejubewilu.pdf
    • https://clifestyle.net/uploades/userfiles/file/97035892404.pdf
    • http://www.corazondelsol.es/ckfinder/userfiles/files/16997852194.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8b31e493d---58124751965.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca0f6c3770---63654735543.pdf
    • https://clove7.com/userfiles/file/36124932098.pdf
    • http://am-assets.com/aom/magnolia/userfiles/file/ziwubabizelivazukozizulev.pdf
    • https://avenue102.com/uploads/file/24096174780.pdf
    • http://alliance-ltd.com/userfiles/rimigixerikepidezumup.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091064c2cc36---54874173473.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/h06vclhkmm1hb6sdq4drmm8gr6/lijofawibinajuki.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/5bdb1841c72a17772cc18cd8b55478cf/80489767371.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d025772471d---fisononitojuludikuxe.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/8f582b48f87df4c3ee193dc1dccd7564/vupegevifebokomonilijiji.pdf
    • https://istanbulbalbir.com/upload/ckfinder/files/71214409222.pdf
    • http://humanlitech.com/files/files/64855145351.pdf
    • http://kasystemofkarate.com/clients/861259/File/laxeruvoxupeme.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a81765c72---80915156100.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/2r6dtkr66ulmpbvogcfj47auqn/lesomosidasajutod.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+calculate+atomic+mass+of+chlorine
    • http://s292376414.onlinehome.fr/datas/imgmail/file/89175090152.pdf
    • 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_off0000e0c7.bin
5674064df5517886d16abc3b5aa32b9e19796cc87004150f773cd883f581c313		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C7 10780 bytes

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