Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cb090042004862…

MALICIOUS

PDF

85.3 KB Created: 2021-06-30 05:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b40325d26f5d309d48acbde3bb8980dc SHA-1: 992725c2aa24562b1986a6c32534438eb0a37e66 SHA-256: 14cb0900420048626cd742c0e358dcf0c5f8f221084e4c1325664775bd979984
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are part of a link farm hosted on disposable or compromised domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dajuicebarus.com/uploads/files/sobofisurijuso.pdf
    • http://everbeenmagnet.com/js/upfiles/files/devitise.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cf146fd8d---12159724577.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800a87536bc---vajalejufo.pdf
    • http://beiwendq.com//data/attachment/file/11080471131.pdf
    • https://liniagdanskzydowo.pl/files/lorev.pdf
    • http://ahchala.com/img/file/26800313761.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/4c7056bdbc7ffb9aac2763c256b5ee39/59232748555.pdf
    • http://activesolutionelectric.com/images/file/gusitububaname.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/a03fa15fb14ce6787733ae98640688a7/97651778717.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bc0517838---vigolurubaxenevosugu.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/182ae0da4152e7f872ce39e1c352608f/51480104855.pdf
    • http://sadiqandsons.com/userfiles/files/sidajabobizipewopasiwas.pdf
    • http://skonasystems.com/userfiles/file/22353575494.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2b938759b---79949079670.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/9cdcfe6317ca91bd14b47ad8dfc73434/nuramuw.pdf
    • http://web68s.com/upload/files/zononoxeno.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac902040e91---sitixoxexu.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080f315a4f55---demukeragekilemip.pdf
    • https://stef-nancy.fr/upload/document/maxeza.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160718caa5d4e4---jokibelazovusadoxupidom.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=enthuzst+truck+giveaway
    • 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_off0000eaa9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA9 16792 bytes
font_01_sfnt_off000102bb.bin
6765d5ff0ea95eafdd6ccb9f073d809c9eec90849811084d82cfcf44a4dcb270
pdf-font-stream PDF embedded font (sfnt) at offset 0x102BB 16976 bytes
font_02_sfnt_off00012f3a.bin
4a3808ef904a0b94a4e15eee9bc52723d7dc319605a352c3f400c96f64f35f1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3A 10844 bytes