Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4dbc2e829d7a03b…

MALICIOUS

PDF

112.8 KB Created: 2021-06-08 18:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cc1018c04053ebf50e6c93acf5077385 SHA-1: e57187299194028aa2901b8d019a6323d7a8d34a SHA-256: b4dbc2e829d7a03b9d688949fb414e01f826c993c0f2027b36ce4d70c62ab382
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious and contains numerous links to compromised WordPress sites and other disposable hosting. The document body, though heavily obfuscated, suggests a lure related to 'graphics mod for minecraft pe', likely intended to trick users into visiting malicious URLs. The presence of multiple external URI heuristics and a high ML score further support its malicious intent, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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=graphics+mod+for+minecraft+pe PDF link annotation
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdf67e1d8f---20301675012.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/cqc85r4d0uhsvv96u0fqm7kh8r/sitawekugowo.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/kujowibuka.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/kokovidunimoxemowetem.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/dogajizubuworazutowura.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/s5td2rs54n0ekpu3t51kcitull/mugirotigagekafabap.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/mkh58gt0q2f3iv48i7jn3t0cjn/zufubenodipurawo.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/bbc83751c8f2074f1ab0a958819fe0d4/mimebabuj.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/gufufa.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc024e07b2---19139086601.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4u4tobu4fppt3gp3kr6609ane0/zaxobipefiw.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16086c50bf21f6---3589577546.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607edf185bc75---vowozajovejuwuvuxelori.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1606dfe2386366---sudalizisozalo.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92926108a5---vesakedunibuxuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00017e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E65 5392 bytes
SHA-256: ad756e3c087d90af023a7f80802dbc36cf19300b3bf14fe9882b5c3d65d9da63
font_01_sfnt_off00019092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19092 10976 bytes
SHA-256: 23de66e1223f4ea71d18dd7992ea2a416f97cf8da7c16441b2d86aaa9a052c9a