Malicious PDF — malware analysis report

Static analysis result for SHA-256 003e7a48db9aa2e8…

MALICIOUS

PDF

66.5 KB Created: 2021-06-24 06:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8385656d1e1e02c237d1b24396c80afa SHA-1: 5c61673225ec859a16347ba41a5f223b1067cb41 SHA-256: 003e7a48db9aa2e84731ed19fa60cdc5ae8baf3caa98d64e1fd172fd332508d1
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate maliciousness, with the file being identified as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'shape of you mp3 song', likely to trick users into visiting the malicious URLs.

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://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/2c78f8cd9574db938ad6c406357585a6/jelizixup.pdf In PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ahbs5731g8qg50msa0gjrgimr3/jufozisadevup.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16080c110242fb---zenupuku.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/ninedupof.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210618_909B30E73EA2EC8F.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160742ba8dad6e---rukufuvixepovotuwu.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/d4baf20504b1f068fba533e37c0249a1/68503859774.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/95325c6edc9d64226314bda181fad071/95494362786.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/79250848425.pdfIn PDF document text
    • http://foodsafebox.com/ckfinder/userfiles/files/debepexivaxolozifaxa.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/lexenififuseg.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/97149406688.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/91713996714.pdfIn PDF document text
    • https://nhadatonline24h.com/Images_upload/files/52947607579.pdfIn PDF document text
    • http://wernitznigg.at/files/remojabaz.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16094d0d52e8a6---7841585217.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=shape+of+you+mp3+songPDF 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A4 5556 bytes
SHA-256: 34694e20dc382f17fe33856d0da72c993c50fcd73f09d8fd57db91894d52b42f
font_01_sfnt_off0000d87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87D 10716 bytes
SHA-256: e7703f2e96d6d60ffa881969c607276561b0a86546f0b776a8c40fcd953f1fa4

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