Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b03da4d38c521c…

MALICIOUS

PDF

62.2 KB Created: 2021-07-19 00:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d4e63f58a44e92bf4bc60723d8e89f36 SHA-1: f7d901ab58b13c87324844d19e8a303fd7497966 SHA-256: 28b03da4d38c521c6bf1f8f292fa68ba4fd6129fa78dc32fe15cb46403085e1a
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. These links are likely intended to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4857

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://ei-windykacja.pl/upload/file/mobokizewep.pdf In PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05e3af38e0---femimujamebegovodo.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/725e8e8b41b9b15d079bdaee4955ea35/lotojexusikegojomun.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/55768520973.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/uwogezusa.pdfIn PDF document text
    • http://riversedgefm.com/files/file/75183429686.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/dasidorir.pdfIn PDF document text
    • http://artospace.com/pics/file/35864010785.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/7e30b86881898aeea333b4c1b7090bb0/zexubujazigada.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/7bbb0c55de6f982b114c23112be4ec1f/losagoradiwavonusitutuvuk.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/67684513181.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/459b0133ddeb8796b861f3fd00e47b44/76432423869.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5de2a488c3---kazabapibadodakezixega.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1609455b09907a---56768462687.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/40260066995.pdfIn PDF document text
    • http://hoggard1975.com/clients/a/a4/a43fc1111b7ad4318f8b553feb79a890/File/44102420417.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/36190555931.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947d932c2d8---webaxogakaze.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/sasininutosodudakuxig.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cd5a246ee---89637331617.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b061a8262e1---sowukuvaje.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/29580164850.pdfIn PDF document text
    • http://berbun.com/user_img/file/39480420686.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=can+puppies+eat+sunflower+seedsPDF link annotation

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