Malicious PDF — malware analysis report

Static analysis result for SHA-256 026558f401e5de52…

MALICIOUS

PDF

90.2 KB Created: 2021-06-27 04:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: dc4aa4410552ed64d10d803ab2cff807 SHA-1: 5ea2a5295c3bf440de79025746cf748641d1c165 SHA-256: 026558f401e5de5254360fa03e24339a647f19fe9ff295052cd4d07dd65977fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to compromised CMS upload storage, suggesting it's designed to host and distribute malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely using a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/f933c919d25b267eefabbeb647bcce27/sotororafete.pdf In PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/4pebein27l9b8hirv8ijrsupqr/69089373374.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88ed2b36b4---riboxababobotevetika.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/c6dvgh02vb3em3fednsrruvh5i/tevosa.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/92616039f602488e592e744041d5d5ca/21990478851.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/79998554466.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9a80e7783---22781957667.pdfIn PDF document text
    • http://slphs66.com/clients/e/e6/e62fa13cff665df70d7481f632b33819/File/tututegimagimofokuxopug.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/fumarutugelup.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/14313050015.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/5e753fd9bbb9de4b38b249ef8c7ee0b2/wegemuzejorana.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/42685819846.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/9g06cv121eacab5r6j6dh956b2/fuvudebulurifagafujavovu.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/94176593852.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff7f70d1ce---tarunewawilulumodetu.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c364b314976---30812093913.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/14106592181.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/us32529pnuc2njbch98mfaal1m/fuludilulilapam.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/e389ba4f21bb09ee084e5482329a74e6/58756948044.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160cdd614f12f9---runatarodaman.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/kusivodigasux.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021062309343865.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/5f1b60c9da3a310a31dfb51211f1027a/dejapozix.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/dbf9400af386cb1d0f32a517291e544a/58649356774.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=medicare+benefit+policy+manual+chapter+1PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC08 11116 bytes
SHA-256: daf69014c2322a85226a7bbce59a8b253bb85ac6c54f17741e38935b6300290a
font_01_sfnt_off00011591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11591 17400 bytes
SHA-256: 7a2b335c75b5ca0386543f3bfdf9dc75cb3f8b0fa90629f492d5500723aaf82b
font_02_sfnt_off0001432e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1432E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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