Malicious PDF — malware analysis report

Static analysis result for SHA-256 a18cbe6126e4696b…

MALICIOUS

PDF

84.6 KB Created: 2021-07-31 15:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 531b8238cb14168d75ce0c0b2a8490d0 SHA-1: 177714d1c6a1456131be3f0add9a64eecc299c0b SHA-256: a18cbe6126e4696bed2823b9fc98366519b8391ac99dea669fce8b42f9868e42
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the link farm heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9574

Heuristics 5

  • 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
  • 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://swagath.co/new/ckfinder/userfiles/files/gegufemobebasijujukowane.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/hhlt333amdplu38dmc5v6qsv8q/bidiliwuke.pdf
    • http://www.haztartasigepszakuzlet.hu/pics/file/sajale.pdf
    • http://ipsgroupjjn.org/userfiles/file/mosofikaribi.pdf
    • https://creteservices.com/FCKeditor/userimages/file/21032734014.pdf
    • https://marbeyoyun.com/calisma2/files/uploads/40646805093.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a597318a9c---98572758127.pdf
    • https://copperscraphandlers.com/ckfinder/userfiles/files/50078297748.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9aea8e9e9---27980616316.pdf
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/2601dba34c6741d56094f70b525a9bdd/janopimedudaporog.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f26a7fce5eb---vipaxoginidogaruvifuki.pdf
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/xikolaz.pdf
    • https://mszukam.pl/dat//file/tuvipidewezafotejam.pdf
    • http://thegioidahoacuong.com/uploads/image/files/fekopijulura.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c33cc77a091---fajuzozojaberokosar.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/7eqfbg3gvlgd6oknvnev62n3d3/bilefidofaguz.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/qtdvf2aermetd7rgeou1mg7tds/fowidedojegitibo.pdf
    • http://verypool.cn/images/upload/File/11690582187.pdf
    • http://zabradli-znerezu.cz/userfiles/file/dopokilizodemidowen.pdf
    • http://nicenpos.com/userData/board/file/39996369153.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c37b66ea891---rikezikojali.pdf
    • https://kvkumariajnkvv.org/singhania/downloads/file/20043729294.pdf
    • http://aaaexpressheating.com/userfiles/file/fumubexata.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=ctgp+revolution+1.03+iso+download
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122F8 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.