Malicious PDF — malware analysis report

Static analysis result for SHA-256 9000ea9e4c5c36af…

MALICIOUS

PDF

75.5 KB Created: 2021-07-01 10:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c5e041f13aad152ad03ec55208e2812 SHA-1: 1263ab5db54f16410748b719d1d920c0cf868ddc SHA-256: 9000ea9e4c5c36af9ee2655179f257225d6db4dad15b723ae17d6e79e11e571c
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites used for hosting malicious PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URLs suggest a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://wegofa.com/userfiles/file/52700588521.pdf
    • http://maszyny.pl/userfiles/file/vadojasipalerago.pdf
    • https://bangprice.combangprice.com/beta/cms_image/file/68642411708.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb68d76ea6---61639547989.pdf
    • http://regmac.net/userfiles/files/88604561952.pdf
    • http://smeclassof1987reunion.com/clients/37165/File/kesipulatenofizadirivijuz.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/dk6bfiod4u41pf7j0mdj0qc1b6/domejikebasebuwe.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/e6jnor10h5ekr3ja8uqo2c0do6/28566965717.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c30e7e71f---jodaxiposomewuwefudeto.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cee5d36a195---sijipu.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851835567e3---24615729319.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608c112910472---76711716210.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b83f8aaab3---gigoferubupanatil.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/08pcaokds4oavc5t5regpr4gll/19970453852.pdf
    • https://autotrans911.com/thread/admin/uploads/file/nanivadexenuwenuxasutiv.pdf
    • https://dotcomtravelegypt.com/userfiles/files/3062959593.pdf
    • http://etpatatietpatata.com/userfiles/files/jijuzitam.pdf
    • http://buergerforum-tirol.at/file/vunapiwifejezid.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608716c3d89f3---lozinizefodupebor.pdf
    • https://zulapin.com/calisma2/files/uploads/dowoninedukamikuwital.pdf
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/154ddd9cb327bde15b93d907072571e2/soxadafenaz.pdf
    • https://nusantarabet4d1.com/contents//files/nasurafuvimedifit.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ace6b00da58---gajorexiletulufuxuxuzudol.pdf
    • https://ajitcoatings.com/uploads/rulijedirurinumarixu.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606d373f29f46---82987689865.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/omlav2g4jh8km0nvvgpffj9its/vodulefijevojumemuko.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=dragon+express+number
    • 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_off0000c53b.bin
bff4d4646780ff1f81289989d598af85534db1926bb21e014d4e9a78764c73f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC53B 10700 bytes
font_01_sfnt_off0000dd90.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD90 16792 bytes
font_02_sfnt_off0000f5a2.bin
bd08952d8b330ace8e78698b8535dcf8d1a665871d00c6992206b7b8aa41bb28
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A2 16540 bytes