Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00dfe37485f07ef…

MALICIOUS

PDF

86.3 KB Created: 2021-07-04 20:37:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 778c213dd386ce3d2dd581d914ef3b49 SHA-1: 3d8a8d06b6de150e0e44ddd83f9f376075553c60 SHA-256: d00dfe37485f07efb4911ee9a3ee18fc1179e1173fab0d4d98d7bc2e4c4ccd67
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic strongly suggests the document is designed to trick users into installing malicious browser extensions or updates. While no scripts were directly extracted, the presence of numerous external URLs, some hosted on compromised CMS platforms, points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/46c1c6c4af4a253864a5975073890324/kuxomobibegivolominuremin.pdf
    • http://pgnsualumni.com/clients/872691/File/56942690679.pdf
    • http://ferrogep99.hu/static/media/file/94180883126.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/69715501904.pdf
    • http://ypcalumni.com/clients/2/24/24042806289e0d450134266962f0a0d8/File/29726366808.pdf
    • https://clickkedai.com/userfiles/file/54294867951.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a4749735005---tewobobogexotovi.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44cb7f2fbf---95548417803.pdf
    • https://northcoteplaza.com/userfiles/file/88331722194.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09d5fa01e6---ropojatudaridarewujupu.pdf
    • https://sambelteri.com/contents//files/79613951735.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607613ef6fcac---gazidibojagixadarinuvob.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/qnoekml7r0v97ndaelkuem4570/63475355459.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/tndf4d9g12vmcf263sdr9h0p41/80000918565.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc8893ba589---giborivevezikevigom.pdf
    • https://asthasupermarket.com/userfiles/file/38129837258.pdf
    • http://alexhofford.com/temp/files/file/83552188535.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16085d8fb9541c---29928056521.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16098b1cf6f146---11342856127.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607005be13c46---rewozasulajegufojibe.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c13076de5eb---15374714123.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5c0b8dc17---nijufesapufojaf.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875ac0464ff---lemazagitizovexaz.pdf
    • http://hotelbelleepoque.bg/userfiles/file/wetupewopudavogexogupele.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=annabelle+free+download
    • 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_off0000efa1.bin
a528a7d34fb4f39a81a4b77da403d4bfb6020350d036bc981fe1f32694d3a1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA1 17308 bytes
font_01_sfnt_off00011ceb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEB 16792 bytes
font_02_sfnt_off00013502.bin
c9799ebd3eb19d4888b5cb49d6455d399beabf7b1f99915618a3692f612aaad3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13502 10196 bytes