Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa50d72d8eef34f…

MALICIOUS

PDF

82.5 KB Created: 2021-09-09 17:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2fc71592345b1a449a4f9a89a6039e7b SHA-1: 443995b618abb481ac4c0f174db873a37c7a36c3 SHA-256: dfa50d72d8eef34f32320fc9f350ffb9aa794fc6e199f95528760aa219f9699c
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 point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm designed to appear legitimate, likely to trick users into clicking malicious links. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://angarakshaksecurity.com/userfiles/file/tetonovolitonetik.pdf In PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/4da8654d6f032c0651ee83b0f5726c2e/paberegalege.pdfIn PDF document text
    • http://metzlerranch.com/userimages/29134060257.pdfIn PDF document text
    • http://merwepizza.com/upload/file/83761482223.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/wejewisaboz.pdfIn PDF document text
    • https://yifff.se/userfiles/file/dunofalibo.pdfIn PDF document text
    • http://gok-maciejowice.pl/js/ckfinder/userfiles/files/72910601993.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/39437676933.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/p3mmpkak6b887ktv1scp5khlu7/galebexaremolebera.pdfIn PDF document text
    • http://kaitianjinghua.cn/admin/userfiles/file/202109051449131298.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/woligelufopibaxudosisukod.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/698bb2c9a948502b5671a61c442463a6/ginawajaberov.pdfIn PDF document text
    • http://re-media.ru/foto/ck/files/24084579019.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/87740716746.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/95491596972.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/rukawodomi.pdfIn PDF document text
    • https://tessuno.com/upload/files/6138f9f6783a4.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff52ae7bb2---janamonigekegube.pdfIn PDF document text
    • http://dnt-mayak.ru/content/File/59184542948.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/vesibisusogavexapovipagu.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/92134968292.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/lititev.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/jiradorabol.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/77241388838.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=android+battery+percentage+in+notification+barPDF link annotation
    • 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_off0000dce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE6 10816 bytes
SHA-256: 7e2980abe928688671ed943278daa306ed5938480bbfc16fbb23cd8ffdaee230
font_01_sfnt_off0000f596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF596 18048 bytes
SHA-256: 43068b20403b8d6d5c842699f24cd99c3f9b1bb4eac9b74f48dc08911597482d
font_02_sfnt_off00012394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12394 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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