Malicious PDF — malware analysis report

Static analysis result for SHA-256 bccf4dcc19b1c196…

MALICIOUS

PDF

81.7 KB Created: 2021-09-13 12:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2a124dbb8f2f1bcfe407de42bbadf7a1 SHA-1: f6c982b8eb08210949e620ce976474b47b2ac926 SHA-256: bccf4dcc19b1c1968d247d499191c134655881bb10ab755365cd1732e4ae6072
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL analysis point towards a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://simsvizag.com/admin/uploadedfiles/file///tewovamikukutawid.pdf
    • http://www.naturhalles.fr/fckeditor/userfiles/file/kupibelat.pdf
    • http://thesei.com/
    • http://avvocato-callegaro.it/public/file/gagilinikexib.pdf
    • http://bdnchem.com/upload/files/fopibuso.pdf
    • http://beccaro.it/userfiles/files/fupujigabezoj.pdf
    • http://kmconlinecme.com/userfiles/file/2744316696.pdf
    • http://babijie.com/upload_fck/file/2021-9-8/20210908010014907685.pdf
    • http://www.og2c.com/images/file/domaxoximusi.pdf
    • http://sibzakon.ru/ckfinder/userfiles/files/gobibudemadobivifuru.pdf
    • https://gencatakan.com/upload/file/81473442918.pdf
    • http://onestep-tokyo.com/userfiles/file/suvapuzoribepidotuzusa.pdf
    • https://sportsslife.net/upload/ckfinder/files/nujorid.pdf
    • http://hagelkonzept.com/userfiles/file/25812149162.pdf
    • http://myucpb.net/userfiles/file/81145566058.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8b8208d5c---zobazudoxobewoli.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/7sol010tl4a679tmt68cgbbjgn/xerekuwaduzabawul.pdf
    • http://ansonseatery.com/uploads/files/jamasotufinelapadatadi.pdf
    • http://beiks.info/public/file/zojiwifumiferibexoni.pdf
    • https://fajndoktor.cz/images/file/files/vavesurotenelipuwotu.pdf
    • http://marienoellebermond.com/img/uploaded/file/wiruveda.pdf
    • http://www.hussco-steel.com/husscofiles/files/24982812254.pdf
    • http://ngnjl.com/userfiles/files/videdufejex.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/haqkaoem4t178icjq2rbba007q/90952240897.pdf
    • http://puebloexec.com/userfiles/file/papumiketoxoxerawiwesofo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=what+type+of+color+scheme+do+orange+and+red+orange+make
    • 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_off0000d842.bin
d70782c25b5db967b888b5cd47be900ab3087acbb04d122725f7c4884a208f9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD842 11176 bytes
font_01_sfnt_off0000f219.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF219 16792 bytes
font_02_sfnt_off00010a2b.bin
4c05da91d3b99d2ec280eda4d67b837a62faccb8fae7a0e268f6ea067172d7ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2B 17804 bytes