Malicious PDF — malware analysis report

Static analysis result for SHA-256 345b5d150a8b361b…

MALICIOUS

PDF

86.1 KB Created: 2021-07-20 03:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f66c85ed5e354da4083bc95addade2c9 SHA-1: 970fa6ae2338fdccd416d9a289f1c6e3bb4351d7 SHA-256: 345b5d150a8b361bf4623645ae77ef93da7d70134878d08e0296481cca34ce83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The file's structure and the presence of multiple links on potentially disposable hosting indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/15948456121.pdf In PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202105242317490796.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/c8558d882bd4d566c84e628516b9481b/tovoludamamesipivox.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/nakozisez.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/49020044221.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/32174461833.pdfIn PDF document text
    • https://hgb.se/filer/file/vonaf.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/51674639510.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/31aeb347966e70dd49beff9c9f354b60/satoxafiwukotadovimux.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ad92e1e7360---95398368252.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160d1bfd56a0ed---37286281796.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/4551757698.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/rumalotegixosurowevi.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/pitafomi.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160acaf45a6bf3---3113057277.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/faseralirugexizarobir.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3d2e707571---nidujolinegexopag.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/xusunizum.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/rozasizugusuf.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/545fc747da574d7f22053b19eaa7df44/32778562573.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/ranepajazidujiwil.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4651e014f3---14211561284.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/84d1be12496508b48ebf7d8f0fdcbc52/59479618849.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=principal+in+chargePDF 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_off0000ef93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A5 17212 bytes
SHA-256: 11a1309c016bf3a0aafe9fde22a26bb595227a99451f0f8c15ba806350f6b176
font_02_sfnt_off000134a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A3 10268 bytes
SHA-256: b0003b63f603e4c7b59fb37b198120acc47d38510f08f09c0db94dfde44ca4a7

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