Malicious PDF — malware analysis report

Static analysis result for SHA-256 12fc89e52ed002bd…

MALICIOUS

PDF

73.7 KB Created: 2021-09-17 20:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f79319c4dac42679aa2f485f2ad6b081 SHA-1: e0cbbc508ca71e5cd4fb10ea2b20270b356eb693 SHA-256: 12fc89e52ed002bd6ead06fa25c1b769b4a4f65425b0244f2c28dc8276cd6b46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to other PDF documents hosted on compromised websites, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://mofrantech.com/userfiles/file/suzojilukogejoxinamanod.pdf
    • http://cancercareresearch.com/userfiles/file/70053898109.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/854b8adea83c14434558eb87b7ac06c8/pumorov.pdf
    • https://dortmundpools.com/contents/files/wuwemorekexi.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8560b94fd---65800248313.pdf
    • http://boldogelet.hu/media/26813398631.pdf
    • https://snapstudios.ca/userfiles/file/sofofuxulozezakum.pdf
    • http://smolninskayahotel.com/userfiles/file/zegum.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/161395904ab570---bipapepugukumatiful.pdf
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/72946727264.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/b4a7aa8e1e4e4e0cea419dc84ad544ff/51089695864.pdf
    • http://80tner.netsociality.com/upload/files/75513252218.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364be44a0c0---givulidasolugusa.pdf
    • http://anbao.vn/uploads/userfiles/file/38392890705.pdf
    • https://rajaketiga.com/contents/files/ramuxologejadunepara.pdf
    • https://flavio-tonon.it/public/file/85746478785.pdf
    • https://reviewz.eu/app/webroot/files/userfiles/files/67221918837.pdf
    • https://deesudcoolingtower.com/userfiles/file/lolal.pdf
    • http://sziszolg.hu/editor_up/74027366417.pdf
    • https://smshealthcareservices.com/ckfinder/userfiles/files/lezuramolaxubisafajes.pdf
    • http://www.impactit.in/ckfinder/userfiles/files/jezatamarap.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/reeif3le9p5ir8r29n3tksbmv4/83414463021.pdf
    • http://oikoscoccatoarchitettura.com/userfiles/files/81193815363.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=alien+covenant+full+movie+online
    • 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_off0000ba8c.bin
b3cfd7bd483b0934cc7f871f8fd425c6676990d5b242a58ec20243992333b7ad
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA8C 10376 bytes
font_01_sfnt_off0000d211.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD211 16792 bytes
font_02_sfnt_off0000ea23.bin
a0af1d5e53e5a9e3245d7a4b1b8ed4a596948f53b483ea27e0297ed0206ba1d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA23 18488 bytes