Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eeaf2bd929e3c11…

MALICIOUS

PDF

84.6 KB Created: 2021-08-16 06:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7a6e9f2fc9222f9b51fa7a8a1edb5849 SHA-1: 0d6d04bb50ee67d237d2ebdebc004eee87edf58c SHA-256: 4eeaf2bd929e3c1192fea7e78c3fb299a25cae18387c2501e6731cb80d3e29b9
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of these links and the nature of the heuristics strongly suggest a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/1f9a643fb781d00d6cb6bbe6626b7ab2/tumerikaropanos.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16074f8a1bf6ea---rakilazejuzipin.pdf
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/54034221330.pdf
    • http://geyikkimya.com/userfiles/upload/file/wikumoju.pdf
    • https://floridainvestment.cz/files/file/vavizeranujezuxetato.pdf
    • http://coumert.com/images/file/rudavifabirisowobiwu.pdf
    • http://ranjitabiswas.com/userfiles/files/74456333682.pdf
    • http://rocb-ap.org/file_media/file_image/file/71309252108.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0eb27bcf---29660241808.pdf
    • https://okna-kursk.ru/page_edit/_samples/userfiles/files/nusemijiliwijiteze.pdf
    • http://angelcabrera.com/FCKfiles/file/wodozunedidub.pdf
    • http://dkmmotor.com/files/userfiles/file/58490506930.pdf
    • http://shijijiaming.net/filespath/files/20210807115401.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087538dae307---94365694975.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/fd828fb7096caf6556e591837aeb8c58/melifolexurevuforez.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/1sl5bgoh7trkh6mhnl1am1vilr/90679883205.pdf
    • https://congtydaihai.com/upload/files/sabigiselezopevekagumu.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/kmjrmvephc1i6nj5v09921laj2/gevomixotewenezegakefimo.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608213e744f63---lirezeze.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72186aba99---raviropega.pdf
    • https://bibonatura.hu/ckfinder/userfiles/files/netaporezofe.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/goeuh6a80u7orduuc85m0quv51/57650698707.pdf
    • http://wirheiraten.de/images/file/tegomunimi.pdf
    • http://tonioloclaudio.it/userfiles/files/kosufusazudujigi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=ielts+listening+topics+with+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C5 16792 bytes
font_01_sfnt_off0000fdd7.bin
120afdbcfd22246ecee8cd6cdf324f7d2c546b9c45d02e8a0ccd854ac22882e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD7 16900 bytes
font_02_sfnt_off0001299f.bin
302e44a37ecd22655e282f0151eda211adee1cfdf07e28083cf4afd0e85d2cd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1299F 10688 bytes