Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ebd5188004867a1…

MALICIOUS

PDF

83.1 KB Created: 2021-07-18 07:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 50ae158916a89b590b0aa548eb8006e5 SHA-1: 84efa6e56c5327b533bf96dd9097828e3f95df32 SHA-256: 1ebd5188004867a13421f9b28b4bc699204194fbf7b3689445dd1c6c72c02487
124 Risk Score

Malware Insights

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

The PDF file was detected by ClamAV as a phishing trojan. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. These links likely serve to redirect users to malicious content or phishing pages, a common tactic for initial access.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3776

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.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/3mn97cid5ucg6uirqffua867gg/molet.pdf In PDF document text
    • https://grup-insaat.com/userfiles/file/gelobenenizinomilebufiz.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/9raqhg2n98oqov9k58u4tlk217/39367791944.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/ah5s14i0f873lrqtftojghrhd4/43288861443.pdfIn PDF document text
    • https://service-panev.com/userfiles/97749856991.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/13041769464.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/79622796751.pdfIn PDF document text
    • https://retta-bg.com/userfiles/69577816009.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a402689cbb0---zebavugokapelirefudaw.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/9716c6a136634ec4ed2004f230c0d2bf/zarokowaliv.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f067e477571---lerer.pdfIn PDF document text
    • http://wrhs1976.com/clients/0/08/080801f2a31a95d446b71e9836a5425d/File/zabuginedozilav.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2557a6b134---jukenin.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c9f367fef---nojufozawuwuji.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/9h5eb8c4cdchjptqakuaulm0ds/matirazegaxiluvofobuditoj.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160780edd95c89---23570947265.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/kogunugobupivivod.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/onq7vsckgl8uedgc687mvfmrna/81060184364.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/vudepinugirulexuzuxulawaf.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/fd8e95b35ec03c943a7bffd50621e28c/tagatip.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16097c4384551d---2537433173.pdfIn PDF document text
    • http://sns.hu/_user/file/jujulefudiluxeg.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/cdb451c8858c6910ad312b202536d3ff/topixamudelofogogodefunub.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/bad4026ab2645f9da50b5b442e56be7a/vufezo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=rick+and+morty+needful+thingsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD3 11272 bytes
SHA-256: e05f8716aa02c8c6ecea72dd578fedbc3488069dd4331226d190f89cb7089bf1
font_01_sfnt_off000116ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116ED 16928 bytes
SHA-256: e108b3d05f557ba5e650b798d35777e0abfa0e85dfa01d3b41b3bd8ac25c5a28