Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6349fb80bb1429e…

MALICIOUS

PDF

77.5 KB Created: 2021-09-06 13:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5126e9649b584cf07cb36291dff96c0b SHA-1: 552f1e3a482aa5b43d19efd090af2decc6d3ae9d SHA-256: e6349fb80bb1429e390cee726b166e8c8a41a2f9f0e72db8a42caed985359f1a
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable domains. These links are likely used to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7569

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://queure.ru/uplcv?utm_term=longman+academic+writing+series+2+pdf PDF link annotation
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/47ec17de77470ef84c51aec8b119f264/xedozorilel.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/81phs46i8igg1j65gtfjvdmv12/87747362227.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/rerixixu.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/59e1b4adf429169a4b4d43ef17d7d6fd/19123376642.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a71b031af7d---86209919517.pdfIn PDF document text
    • http://tulga.ru/editor/files/kewogagulogikidonuwemub.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/17832582439.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088a2e33b46f---vemimalepoforetusux.pdfIn PDF document text
    • https://alstar.uz/images/shared/file/17152065317.pdfIn PDF document text
    • https://best-label.com/upload/files/10680309248.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/zakebiraped.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16098996a312a1---65434426926.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/161343622d3bad---95158404200.pdfIn PDF document text
    • http://ournextfamilyreunion.com/clients/4/49/491fb30de6d8464ca6518fa43aba5bd5/File/luwujegobodiviwofor.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d023d8881---wodazojafokux.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/geduretesen.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/13738277489.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/49513611962.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/d285fatl6avemc5rhid0o6rloh/17500181577.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/98525921111.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/lumarekefotewupufawija.pdfIn PDF document text
    • https://satbietthu.com/luutru/files/dizojumixojo.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf54033be34---rarugo.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160adb658e5877---95430267216.pdfIn PDF document text
    • 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_off0000fc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC42 18444 bytes
SHA-256: 0ec42e6a961fd8a599efeace9f20f790b20d77522a6b774b670765e0b38572f9

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