Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d6d39dd803d75ed…

MALICIOUS

PDF

74.8 KB Created: 2021-06-18 22:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75571cbcdada9580e17edb4fc8205c43 SHA-1: a925a2b4fa4a7a6a665b4e6ad64f57aabeae489e SHA-256: 1d6d39dd803d75edc6f5e28df89dc198d5e4bacbfda01290c6ecd3e5b99baefa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites and other disposable hosting, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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 https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/hjf1se55hn9e0i6n2nv6ko74mm/lolavoduxoxa.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/4aff50a3f52053526dc40429f826d1ef/maruwuwutebuxadobipes.pdf
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/33113741787.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/d2ebf73fc030aff6081e4fb4f27eb222/ximodulofidezivezegi.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16075a3c135532---ripunomusurek.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c68714a1f1---dajowoxozusofogimutonu.pdf
    • https://datajournonepal.org/files/basiwavidasuzivi.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160abb6728d489---60820803495.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993ac6d22be---72560033905.pdf
    • http://singer-island-condos.com/userfiles/files/45949473157.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/88341339e33218fe4843b7c54fd12abc/55145691505.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608008ce9194b---rokejugenub.pdf
    • https://wsbtitan.com/images/file/37104760639.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c75d30a59b---parisizifokugupinanenemam.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0bced8dda---tojidigoxumepufu.pdf
    • https://accuratesearch.com/userfiles/file/90079898508.pdf
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/54978159769752076029b23a8171d6d8/95130682134.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=create+pdf+from+multiple+files
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e507.bin
0e632d8180366f288a8adbff325d1f31fbc542179c19f946a715793801d66e75		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE507 5092 bytes
font_01_sfnt_off0000f63f.bin
c6e4bf8cd489c3c3618e77b27f544c7d4b619c14920096402d33320f9bf2678c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF63F 11712 bytes

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