Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ea0eea91cf0dad…

MALICIOUS

PDF

79.5 KB Created: 2021-09-09 04:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 72aced0a200b83432a61efc26c242284 SHA-1: 7b8c12c1fa2fda1c4969faf3c094e2c39e214dae SHA-256: d1ea0eea91cf0dad2cad8bf43da7ffe3386ef8947a1c101184ef35fc131fd45b
154 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 are hosted on distinct, potentially disposable domains, indicating a link farm designed to obscure the true destination. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to its use in executing malicious actions or redirecting the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://mimpishio.com/contents/files/rumixa.pdf In PDF document text
    • http://ingmarcofaedi.com/userfiles/files/jisiderexuremoriwefudejo.pdfIn PDF document text
    • http://kleiberit.ru/files/file/43470901874.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/74839513049.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210906_A8E1BB56DC7568B8.pdfIn PDF document text
    • http://guowangcable.com/d/files/83056127318.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/jiwutinijeribolebawixe.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/pivalofabakawari.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/zanufoxapokat.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/86418634725.pdfIn PDF document text
    • http://exim5.hu/_user/file/jilajoritite.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/potazanumiwizizewefuxo.pdfIn PDF document text
    • https://gkscam.com/userfiles/file/38413763480.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/mimojeli.pdfIn PDF document text
    • http://nyitotthetvege.kastelyszallodak.hu/userfiles/files/85622916957.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/46479908906.pdfIn PDF document text
    • http://notar-frings.de/userfiles/file/bamimixajebejakizafiko.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/xeledefuxoxotomirilab.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/80870446458.pdfIn PDF document text
    • https://protrialse.eu/files/files/nedodi.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb83322b2b---lifodutigalebubasiro.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136d9a98e2c1---dupuja.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/8627380528.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/manom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+make+a+website+into+pdfPDF 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_off0000d32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32D 10820 bytes
SHA-256: 34aec61f5fe6ea38dc2e781d452d4240c81d59049b84e230213723cd8e886d0b
font_01_sfnt_off0000ebe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE6 17056 bytes
SHA-256: 78806c15cd62ad360fd7319ce0639eb5c291d9407cc988418c8a288643a5de93
font_02_sfnt_off00011842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11842 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1