Malicious PDF — malware analysis report

Static analysis result for SHA-256 2655e1c8c6eb1f0a…

MALICIOUS

PDF

84.2 KB Created: 2021-09-23 15:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5d33d29c4599fb68aae0e5102f874035 SHA-1: 0919c184faa4b483a7d4cc54e0d1ca4e86da6d32 SHA-256: 2655e1c8c6eb1f0a71894ff26b849f67fe10a9198c0382fd2208a95334ff5e7a
156 Risk Score

Malware Insights

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

The PDF contains a link farm heuristic, indicating it directs users to multiple external websites. Several URLs point to compromised CMS uploads or disposable hosting, suggesting a malicious intent to distribute further payloads or conduct phishing. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/87832538992.pdf In PDF document text
    • http://edallyshop.com/upload/files/dugubuvovefogiz.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/rilapozosimotajemufu.pdfIn PDF document text
    • http://balone.net/_upload/file///74273671876.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/tafedumezekigerulafo.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/dd00ac4f5e25434fa7ec6df07465e59d/xanejowe.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/30993386013.pdfIn PDF document text
    • http://princeverma.in/uploads/files/37456049060.pdfIn PDF document text
    • http://kozhencherrymtc.org/userfiles/file/bitewodiguwewelisu.pdfIn PDF document text
    • http://akademibt.com/resimler/files/45770534345.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/65q0sh5qk4c6k5c60vvuu5vvd5/karixonupopezur.pdfIn PDF document text
    • http://benly-carson.com/product/files/sowovilefuwatisebu.pdfIn PDF document text
    • http://anninh247.info/upload/files/96272323916.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/73000123336.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614b5e3b23bde---54481616080.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/vogejas.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/87870744050.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/99308119230.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/sasifadametuzivam.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/79453823218.pdfIn PDF document text
    • https://omnistopbollards.com/application/third_party/ckfinder/userfiles/files/butetuzizeris.pdfIn PDF document text
    • https://bhavanarayanaswamy.org/userfiles/file/31978143151.pdfIn PDF document text
    • http://robbes.nl/media/files/2259456694.pdfIn PDF document text
    • https://tonitomov.com/picture/file/puzojetexizuv.pdfIn PDF document text
    • http://topflexsports.com/uploads/rogedodaza.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/segitigokupe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=contemporary+world+subjectPDF 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_off0000dc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47B 20304 bytes
SHA-256: 5a77823864af4df34cb20f9c53d9af811894b19bf9789bc78f086cc12ec10782
font_02_sfnt_off000128eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128EB 11184 bytes
SHA-256: e1714caccfcf38aa998c48bd4f3ce0485bf30d32bd847db1f9bb5b327d8b0b54

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