Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab4b625c26d2ddf…

MALICIOUS

PDF

83.7 KB Created: 2021-09-06 17:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bbb630dea55b72644961cc20dfbaff81 SHA-1: 9d4858c18e5b11745137afeee9ff557a20f8ccb8 SHA-256: fab4b625c26d2ddf4c1832c9af3bd1bdaa83a3dd7c560a5e02c745e9d7ef3ac9
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or SEO poisoning tactic. The presence of embedded JavaScript indicates an attempt to execute code, likely to redirect the user or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pixomot.ru/uplcv?utm_term=manual+de+nissan+pathfinder+2003 PDF link annotation
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160de1722ca60b---69373359203.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/6483585424.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/zevusibow.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/91057401346.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/15a514cea1570fbefe94e5813272ab7b/venaludapijixet.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/2163f5a5afcf06a6a3d6e09660d46593/92827727373.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/34517182704.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/69956218323.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/29058050139.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/suribokawifezajonafinav.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/joxokomabiborinanomawemi.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/14528810344.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739d76ef330---32418677990.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/26851346655.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f495a4f36---19326825436.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/xuwuboligixedezuluxed.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/17755178208.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/67180968256.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608d48f5ce316---vuzagafobudeluzolijen.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/42892283738.pdfIn PDF document text
    • http://etrustmi.com/ckfinder/userfiles/files/raberemixemirisa.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0f1c4abf38---jexodubalotete.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/cf31fbjmoo6sel5pmnklmidd45/dasajowoni.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/zewifameb.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/20745449597.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE124 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF936 17212 bytes
SHA-256: 6d558f5715c991a99fa9666c8572e74bd3e4388c2834332dbc9c3443a4c6adf6
font_02_sfnt_off000125a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A4 10980 bytes
SHA-256: e39c51b396655c2be8a6fb141da6b91e898f54ef8b240acc20133fcce2bb1707

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