Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9486803888e72c…

MALICIOUS

PDF

97.4 KB Created: 2021-07-27 10:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c08e68ac512f4a0b7a4daf43e97f680e SHA-1: 28b9d7d0c90e0f873a929e6fbcf6a2fdf9e5fd7d SHA-256: fd9486803888e72ccf68f2ef57f0a54f61097021116ca515cafcf3d9a9fe1fa9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of embedded JavaScript and numerous external URIs, many pointing to compromised WordPress sites or disposable hosting, indicates an attempt to redirect users to malicious content. The primary attack pattern involves leveraging these links to distribute further payloads or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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 https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/2bdb3085bd860d0180d932edb9906619/15991497902.pdf
    • http://bezagsecurity.cz/userfiles/timajebuvideliteru.pdf
    • http://quadocdao.vn/uploads/files/30649759272.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160d44ee60f813---21047838936.pdf
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/datubopenurojisagokosinob.pdf
    • http://wamer.org/userfiles/file/29883700450.pdf
    • http://hopkinshigh1988.com/clients/75739/File/wumujufidejebewawo.pdf
    • http://signaturecruise.com/js/ckfinder/userfiles/files/pepebanivewabaputowof.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3c79e54d8c---14166593968.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/5116d11f4bf5156aa84d7c74beafc586/3501381455.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a09802fd0b---doburopa.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/055fd41ad2f0c88b1659b0389406fbdf/33762918769.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1608450473d97a---41001414269.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dfddc6cf605---kutuwizajo.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/79392c1d9c598d8f44ee81483cedef8e/93763910751.pdf
    • https://agrilaui.com/userfiles/file/fojinegedijarepu.pdf
    • http://aircond.md/upload_fck/file/kikomalit.pdf
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021725542501464.pdf
    • http://ristoranteibucanieri.it/userfiles/files/63645418087.pdf
    • https://hgb.se/filer/file/nutajiruxizanewabesilanug.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608361eb2b338---97336601459.pdf
    • http://yogo110.com/userfiles/file/tiked.pdf
    • https://sunarchegypt.com/userfiles/file/94482380841.pdf
    • http://bright-mineral.com/uploadfile/file/2021051504504582.pdf
    • https://mamadona.ru/ckfinder/userfiles/files/vigomodugasodexisefojamaz.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/8ca0df47240f115c443ca1f441ebbdf0/semoxudibik.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=antigone+jean+anouilh+analyse+des+personnages
    • 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_off00011385.bin
dd7b10271c2c9fc677db03645b84f2bb3dc07f2de04f620ebfc685725f3eadf9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11385 19512 bytes
font_01_sfnt_off00014406.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14406 16792 bytes
font_02_sfnt_off00015c1d.bin
2506f0df3183b3331949ad8f6a8b547f3a87c0f2f2fbdcc5d8bb54dc1b22569f
pdf-font-stream PDF embedded font (sfnt) at offset 0x15C1D 10996 bytes