Malicious PDF — malware analysis report

Static analysis result for SHA-256 4557bd29a2ea5374…

MALICIOUS

PDF

78.3 KB Created: 2021-06-14 09:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c7bfd64d1be94089a3ef138704517dfb SHA-1: e5d0b4a78da9c5c33afb72ec6cf19ff902c0d0c9 SHA-256: 4557bd29a2ea5374e3092a25d3c40971fe6d5d49b4eb78bf9d85d79ff92d8a09
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, suggests a lure related to 'Blockman go mod menu apk 2021', indicating a social engineering attempt to drive traffic to malicious URLs.

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://crysiq.ru/uplcv?utm_term=blockman+go+mod+menu+apk+2021 PDF link annotation
    • http://sciattella.net/images/file/kemagelimetezu.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/54623248226.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fea867248---wumirawevus.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/novibidever.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/24219333802.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/b93305b1e2e32445a74dd725a7cac043/pulapu.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/f20e5209e97193ea6e8ae45f7f2fff76/51754968519.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac46749a139---woberun.pdfIn PDF document text
    • https://immobilgold.com/file/40717677550.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/mazapovawukonox.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2aa55a917---jemat.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0714c49a58---zigilofulizam.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/zifipadesuzopomena.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/19f32e32ac9da5ae7633a0b03bf11c6a/7105731930.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B8 2880 bytes
SHA-256: 619a44e8b5c2a2d3fc0e18259d8022938ad4f8b30552901bc68dc41c3d0f2ef0
font_01_sfnt_off0000f2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F6 5556 bytes
SHA-256: d01ab42e53d815f4cc25d5bf67f1935af927655889e3ad3f5f3961b5209c8865
font_02_sfnt_off000105df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DF 11188 bytes
SHA-256: 481be0fc6484792c55323a6a75a720599cbc7a98b87169befbfa43b1fc96f203

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