Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f8f0801903d225…

MALICIOUS

PDF

241.9 KB Created: 2021-06-14 09:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 266370d807f66d9a4b9bc498f8b5e1ac SHA-1: 75271113b8950f2166ed1830b3a21892b62cb5e3 SHA-256: 63f8f0801903d2253b613feb1d13228dfb1d7ee4ae0d2b4d328d37783e10e44c
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=sao+season+3+episode+13 PDF link annotation
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/kh9tjv1p6t6deoojaa3k8ftitg/zupazavodogu.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/iefts8s163t3bgu95fj9ui0737/variwepusigatob.pdfIn PDF document text
    • https://makenie.com/upload/files/40227992119.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/k80s0ikjtn9q0heesumo3lvb55/lisanivesewevi.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/050718054671.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866c6b178d7---71128697045.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608702659945c---19944131790.pdfIn PDF document text
    • https://activepymes.com/pub/file/tajeranerufozofi.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/75c5e4831e4d734ca5f92993533573eb/24609971579.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872d17038b4---18776501237.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/e26att3fuqka3nupcsr1s044d7/butoxubuzijuvuba.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609256384bd4d---14294398748.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0e6e1b91f---72905788217.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/80519638659.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac93a54e674---63628237078.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1b7190055---61528121676.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd66321cb7---20904749223.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
    • 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_off0002f2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2D1 40824 bytes
SHA-256: 088554f80fa3ddf50b645bed0df3372a0d40738ef32de6e3c1af9b66279c93ab
font_01_sfnt_off00036fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36FCF 4852 bytes
SHA-256: 79547a9449534a87bdb62b9469bfaf39fc0be1de4500423e020bfc0c06433199
font_02_sfnt_off00038047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38047 13972 bytes
SHA-256: f129c1a100bcd0267e651c57dda0f41fde7b12b074eaffc0ba9e10ba288d64ef
font_03_sfnt_off0003a9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A9EB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2