Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d53a3910ed4d6f…

MALICIOUS

PDF

72.7 KB Created: 2021-03-09 07:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3d621e995b080b763770036f4dccc9e6 SHA-1: 982f2f437d11252f4d832f64c316e95e42cea78d SHA-256: d1d53a3910ed4d6f4a55865e3eee05f2cf7d238b2e529675cdf42b1b34d79c22
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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.
  • 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://yafferge.ru/123?utm_term=sasural+genda+phool+dance+performance In PDF document text
    • http://com-login8.xyz/709917273017og2d.pdfIn PDF document text
    • http://instapriz24.online/sowajofasusogirazijiriw3akog.pdfIn PDF document text
    • http://milatepe.medianewsonline.com/83865720653.pdfIn PDF document text
    • http://drovazvenigorod.ru/what_is_the_best_weight_gain_diet_plandiz02.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/jolofovonubekukoz.pdfIn PDF document text
    • http://fewafef.iblogger.org/88705926079.pdfIn PDF document text
    • http://keto-menu.online/sowewimofi6t2d0.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/22443926185.pdfIn PDF document text
    • http://zebozewazogaso.scienceontheweb.net/how_to_calculate_dividends_paid_on_common_stock.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/jaxolup.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/dbx_driverack_pa2_dj_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/kapulazifetavogidawovin.pdfIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_90ff70b1c95e43fdb4716503f64d2a47.pdf?index=trueIn PDF document text
    • http://zikoliduxa.atwebpages.com/18682716328.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/56455499437.pdfIn PDF document text
    • http://bibujilapewe.epizy.com/ikea_canada_catalogue_2020_request.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_93ecfb4120284a84a7593145587b3a3e.pdf?index=trueIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_dad1724790df473ea8599a559f1ddc8e.pdf?index=trueIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/bulidovubiwa.pdfIn PDF document text
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_4733b47b5af948aba6a7fbc991031552.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/poresi/71565473249.pdfIn PDF document text
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_242f54b442964ce7a673907ef853f3d6.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFC 5672 bytes
SHA-256: 2c66659532100397f952767f727c93c63a738e0ffbe51abd4e39a21e48c4757a
font_01_sfnt_off0000f11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11A 10652 bytes
SHA-256: 87248130a4ebf05f62954368a45c13fb3ab545ccf65c454c70fb7b0f4be918c5

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