Malicious PDF — malware analysis report

Static analysis result for SHA-256 272940e75cdedb2e…

MALICIOUS

PDF

78.1 KB Created: 2021-08-20 04:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7c13b0d0afc36fa9fc6a16c5fcef8a5f SHA-1: 52150da951e675c427a0291fd9266a89f62965a5 SHA-256: 272940e75cdedb2e5b89ea91984c80dedb3acb62bd35735c98c4c721071db631
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting. The primary purpose appears to be redirecting users to external malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6314

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 https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/fc0d52467e618bc02e92172c1004ff2c/xefadasonotosirofi.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/ac9c44601e7189e47f1904be1483d0f2/vakobosulosezape.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/96446587706.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160723ef8c136d---tazozaz.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6a4b8208---6933581955.pdf
    • https://cutandcolorparrucchieri.it/file/fokifevilesipozizepibix.pdf
    • https://dimensioninteractive.com/WYSIWYGImage/file/53731191839.pdf
    • http://tasarimak.net/ckfinder/userfiles/files/wukuluzixatusekawupuzupik.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160862b82c250f---mukiruvolesogadomovazira.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/ia1u3v5ihbpbjbfvfpmis10efl/jowapaxerunoninabu.pdf
    • http://macautemple.com/userfiles/file/bajodava.pdf
    • http://ijdssymposium.eu/upload/tubufiv.pdf
    • http://cartopack.com/Images/file/pabax.pdf
    • http://dfh-consulting.com/userfiles/file/18172327641.pdf
    • http://przychodnia-felinskiego.pl/uploads/editor/file/69504590391.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ee4d2dd3241---78214378829.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/35db9d1038275bbce786981252d2f5fc/towatijajabilokolujagefe.pdf
    • http://partnerplus30.ru/images/fornews/files/28515310306.pdf
    • http://mega.kz/media/upload/files/51204463827.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/cb177baa9068f7d133da64a73973c1d1/xeladavazirawokevaj.pdf
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607537d6aa342---nutir.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/l0hneegbeof5hnismp0jdb16mt/60433043730.pdf
    • http://toptoptraining.ru/img/upload/file/vosakolilelupefovo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=billy+fuccillo+net+worth+2020
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e72d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE72D 16792 bytes
font_01_sfnt_off0000ff44.bin
eea60ccc4a687c56ff49f48647d7fc21f3b8735ef9eb6583115888e92079e438		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF44 10700 bytes

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