Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1104cee7e89d27…

MALICIOUS

PDF

40.7 KB Created: 2021-07-15 12:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 19ed9e92ba18d4208a0a82beee70d385 SHA-1: 37df253b4d9352a9b3e47370acbfbab87f722653 SHA-256: bd1104cee7e89d27fea6197def8bf39bb4680e1f970a93dd6189334b86597e92
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9382

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://dijitalsanat.link/upload/files/sijidavopasigogigawej.pdf In PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748e74cf2b8---12515579392.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9b4085847---7216162579.pdfIn PDF document text
    • http://iqlacpro.vn/emotive/upload/files/bofujafen.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/7s1on085ds41oponka3ctg0367/92107575815.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/nuwiliduwinawarosotigu.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/60748081568.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/253bf33ab2a6f85a58d88d2e3a4eb99e/98259672907.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/91438011525.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/xifax.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/48264987247.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/path39nue4aohql67ju8s40ta5/7318876916.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/f4f6e2928d8a4922af3ee56113c7893b/rutisiriputasu.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082f20f01409---riwutizetepedimu.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-18/20210518004137876275.pdfIn PDF document text
    • http://senn1962reunion.com/clients/2/2f/2fc2c703930c5c120d54ce0350dd22c7/File/vurelukudamelegoretufe.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/70514402164.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/bexunabupasezo.pdfIn PDF document text
    • http://4bx.pl/public/file/wepexofoguza.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdda385a9d---3292172849.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/g7vk7rf22dcilcvg8jhd92phi1/68981214500.pdfIn PDF document text
    • https://imapcb.org/wp-conIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=enmeshed+narcissistic+motherPDF link annotation

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