Malicious PDF — malware analysis report

Static analysis result for SHA-256 edcec79335af4f03…

MALICIOUS

PDF

63.6 KB Created: 2021-09-02 22:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b1e8058d8fbeebbda7645e2985a3d5fa SHA-1: 2f50e55bd460817fbab3fa8d966f8b29bd979e41 SHA-256: edcec79335af4f03b14aa22e9a6e7da1f1a7b4b8f08440a7044c71ab522060e5
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or trojan delivery mechanism. The heuristics reveal it functions as a link farm, with many embedded URLs pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious content or downloads. The presence of multiple distinct hosts and the use of 'utm_term' parameters further support the link farm and potential phishing intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6700

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://sdv.sk/userfiles/articles/file/21763078813.pdf In PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/161214da232940---zogetipofekepixitugurelud.pdfIn PDF document text
    • http://feuerwehrobrigheim.de/upload/files/34942060696.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16112e229eb90c---wojajozakogotemekagoli.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/tm6qb3s0b7lp5cnr25ijmucqc2/kexupofupar.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/34767466912.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/97738752385.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/a9b94ac72adcbcbc7c52f246ff373fcb/fotowijekawikini.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages//files/91819966980.pdfIn PDF document text
    • http://industriefotografie.ch/userfiles/files/7002973827.pdfIn PDF document text
    • http://epplast.com/files/file/jemozixo.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93fcfc0861---42354234854.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b03fc04cc63---dubida.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/xokaj.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/d1a18e3b820713cd7e64d7e99ec356f5/nazamofen.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/zefumonig.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/84310009971.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/7a9ca3b3f4364b91ddcb649d4a811946/rigomixegefiku.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/a18sisqsmbpgi419ked2dt9j3m/vositopuj.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/pixovalo.pdfIn PDF document text
    • https://le27.fr/docs/file/61963821210.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/1341333747.pdfIn PDF document text
    • http://klpa.net/userData/board/file/81443156656.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/85101987846.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1147ec08d---lurej.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/e73ca25eec35d5a2caef203bbe55e6f6/2274008681.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=rational+combi+oven+manualPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC522 17664 bytes
SHA-256: 62624ec698b7d51733ddf87672ca803405104d9c33ced6a0362b6b6bf1b13626