Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0fc408f829811b…

MALICIOUS

PDF

86.7 KB Created: 2021-07-17 07:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0447643986c5e1d5107ea4bd7040038b SHA-1: be01db5b9b78376f44a3884a0d8c46d3a1e516b6 SHA-256: fd0fc408f829811bc3fcb3706969018b509592b00556e772189a2f56e493ac9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://usarsenal.it/userfiles/files/sufogebikipepene.pdf
    • https://dreamscapes.ca/dream_scapes/userfiles/files/78808108955.pdf
    • http://ibconsulting.it/userfiles/files/73226563520.pdf
    • http://dui-antidote.net/images/userfiles/file/gutuxotevaxap.pdf
    • http://qazaqbanki.kz/data/content/files/momujeje.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f11811570---64738643038.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6060445c6f---kenukujepanagunoduladojux.pdf
    • https://kodcomputers.ro/2664/uploads/xepijakagavo.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160994b4165c3c---2717182159.pdf
    • http://chanakol.com/ckfinder/userfiles/files/34707006488.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/73851163888.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727ab8adfd6---97697505385.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094cfd9df24e---28957791330.pdf
    • http://info56.ru/userfiles/file/68514056236.pdf
    • http://polymer-optix.de/userfiles/file/87640744109.pdf
    • http://ketoanantamhcm.com/uploads/files/45334919235.pdf
    • http://rencontres-icare.org/userfiles/file/36911129398.pdf
    • http://abbwingslynnhaven.com/uploads/files/73500583033.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2a070d092---37530611658.pdf
    • http://osteriadelcampanile.com/userfiles/files/70126695870.pdf
    • http://konyaozgunmobilya.com/userfiles/file/93473328741.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/f8d21817ea97ab07e26efef4c9a2f8ce/wareja.pdf
    • http://119hero.kr/userData/board/file/palisetegodunuzatibe.pdf
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/xafatebisosepedaboxo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+get+into+someone%27s+private+instagram+without+them+knowing
    • 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_off0000eebd.bin
3752788f3093ed5d0c9d2f2488e4782b470f59e10765e8078caec45430d20252
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBD 11024 bytes
font_01_sfnt_off00010841.bin
a50e4ec96b68133cf68c9a0d2490da5009392a7872316be4e68138a45fbc46c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10841 17152 bytes
font_02_sfnt_off000134ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x134CE 16792 bytes