Malicious PDF — malware analysis report

Static analysis result for SHA-256 48577b20e2006d53…

MALICIOUS

PDF

208.4 KB Created: 2021-05-27 13:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 29cf2db4ab75c846027c7a65dfc9d0f7 SHA-1: 6920294362a4d1556a932f252dd7a465b5263220 SHA-256: 48577b20e2006d53bc8c5a30ef584217272bb4633c9606a1488827ec391680a5
134 Risk Score

Malware Insights

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

The file is a PDF that contains links to compromised WordPress sites, suggesting it is part of a phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malware. The presence of a download button heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/lunikukovovafu.pdf In PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/21826ijqru8bcbnea0c5838cj6/gikoworugewakapumofid.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/2f7048fd58680cbb475e2c38260356fa/48215296982.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab712f29576---jofapawirunozajamaza.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/917tnk4r25jgkg37mnu0qfgur5/21811161752.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/qmvh7jvivs93386kjtqndb6tj5/vamagekonowotiwevusira.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4308cad348---2779442266.pdfIn PDF document text
    • https://nadamasristorante.it/file/75349043498.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a099c587940---33498444419.pdfIn PDF document text
    • http://onlineexpert.in/userfiles/file/lekulibar.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/9t6ru7rigp12ubdk8c2dsvp1todlnels/85469295450.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f0c923e5b---32767514576.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f039d172be---75050471175.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160978b178b73d---xeboxarudaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=driver+digi+002+windows+7+64+bitsPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002b7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B7FC 15276 bytes
SHA-256: 97e536f3c038c633d61812029449154418a496e620a05f8d84d3a3d24c1ec0a4
font_01_sfnt_off0002e8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E8BA 5428 bytes
SHA-256: bdff22110913b01804afdcbb087d602c0717ca252aec64c9c5849259b7cb63fb
font_02_sfnt_off0002fb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB62 11612 bytes
SHA-256: 5afd405d4a8d45fcd279e5628ea85abf4aaeda5107af0bc974539c8bb52426f4
font_03_sfnt_off00032309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32309 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c