Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a5e4aac4fa9e666…

MALICIOUS

PDF

80.0 KB Created: 2021-09-16 18:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0add5a84a7fa8424880795b0fb18662c SHA-1: 12651f66791819ed06ccac5f59b6ccdf68444279 SHA-256: 5a5e4aac4fa9e666131c36618f03cdd604b007fb9528b6b5e088dd1e5778d305
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to disposable domains and utilize UTM parameters, indicating a phishing or link-farming scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=pagan+god+names+list PDF link annotation
    • http://gldbirdgel.com/user_img/files/58420363470.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/8936401482.pdfIn PDF document text
    • http://ping-property.com/user_img/files/kazogo.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/runitinilazo.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614168a20c264---zawalexudejupexamafetagik.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/bujozalop.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/gimupej.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/63250059974.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/11944512160.pdfIn PDF document text
    • https://isleo.com/i_photos/file/daxanumunimididu.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109091804383695.pdfIn PDF document text
    • http://mweb.cz/images/file/19128211241.pdfIn PDF document text
    • https://www.confirmedtour.com/files/10237557264.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.com/upload/files/31712665558.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/6774489156.pdfIn PDF document text
    • http://belv.ru/userfiles/file/19141462083.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/xakowaj.pdfIn PDF document text
    • https://angkaganjil.com/contents/files/91232469077.pdfIn PDF document text
    • https://guptajimarriagebureau.com/userfiles/file/nokidigetanaviv.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/loxuk.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/bekenumatojawadigevowebew.pdfIn PDF document text
    • https://daqing-jewelry.com/uploads/files/202109060128413230.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed32413d05---sororimikovutibuwepozojaf.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/22314216555.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_off0000d601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD601 10492 bytes
SHA-256: 7f7b0bf8831e7b738e4a423d427855eb9fa0088b1e677c20b0b0c17c24f47e07
font_01_sfnt_off0000ed99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED99 17528 bytes
SHA-256: 6c8a12bc13514a011d41962852b17bb642d01aec92e089d2fbbd79027a198c00
font_02_sfnt_off00011ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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