Malicious PDF — malware analysis report

Static analysis result for SHA-256 05067e415f4956a7…

MALICIOUS

PDF

74.1 KB Created: 2021-06-11 23:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 44c14134b7a165e0146ae5dba547af61 SHA-1: c5a3915d3314d3020b5c391bdea058caf56e7e0b SHA-256: 05067e415f4956a785d2755efba04270aa5cd4e9ddb9eda3e0558fe59aea50e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score further indicate malicious intent. The document body, though heavily obfuscated, appears to reference a movie title, likely as a lure to entice users to click the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://krisoc.ru/uplcv?utm_term=aakasam+nee+haddura+movie+online+watch PDF link annotation
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/a5t84a2vgiqv77k270n1gaj4e3/30837912727.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/13806681ca85f73b48962247fd0d1837/42211321566.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/e757fcef1ffc7a0adf5b957671cfa2ad/xajefajobage.pdfIn PDF document text
    • http://slsnn.ru/content/file/94200819376.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16099180e93543---49653284009.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae907cd7944---54307622209.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5759265309.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/f14bf371b955381a439f4818bb372822/93291592915.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/99eef07979e26e5171a8cd9827dc8ff8/vasugerodesikedugunovo.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e2fba67e5---43530147356.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/d5773aabf849ee702a7dce08a4db7782/46867379602.pdfIn PDF document text
    • https://chp-travel.ir/data/file/80569974435.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb28ed64a6---53040458023.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/29675295296.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/nurobobu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DF 5384 bytes
SHA-256: 82dca983b487610420f60ca839b07e974348a2ed04d65fe50cc45a3647ce4b57
font_01_sfnt_off0000f719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF719 10732 bytes
SHA-256: eec036e7f3646f0558013dd6dc176a93cdda9d870c343e96ea1648514e36011f