Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9d24cf891a8f80…

MALICIOUS

PDF

109.9 KB Created: 2021-06-15 14:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3d807b04190d76ae87f60e10f953ac94 SHA-1: 84d75b59faaba8f490143cc2346433449eeeae45 SHA-256: 2b9d24cf891a8f809e0e2749b13e2cc9b237e07814aadb2db970214460aa8e8c
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains references to 'X ray mod for minecraft pe 1.16', suggesting a lure to trick users into downloading the malicious file. The numerous embedded URLs point to compromised WordPress sites, likely serving as a link farm to distribute the malware.

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 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://medvor.ru/uplcv?utm_term=x+ray+mod+for+minecraft+pe+1.16 PDF link annotation
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608e9d0b9835f---jadojideko.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/i91ktafqlhi67qrtggknv7pk3k/silepuzaminoxux.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/12016121494.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609f263ab12c2---57547616267.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0f18ac953---babededarap.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b09dd8549b4---66697187816.pdfIn PDF document text
    • https://petala.gr/userfiles/file/wulagedaxin.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/sabejetajesorimemeg.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/kisom.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/52455b5f06baa394ccd43cf9f31a0402/13518417191.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/6c050bc10c15a1f21c38a634ca8b7ca5/54024318907.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/bff8e8b34d2fb434902a6b972d5e3484/zagewebosunufujesigu.pdfIn PDF document text
    • http://biosite.ru/images/news/file/25375520516.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/3mml33aal36guuguuemcu3dqsd/gasaxaliva.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608deaf75069a---nazigomalaxodamisipiru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14853 5196 bytes
SHA-256: 4180240b8a224da6f589cbca21d88ff398138673c46660862f17d2cf5ec608b7
font_01_sfnt_off000159f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159F8 13608 bytes
SHA-256: 1198cfef743b8f740c4215e286a137334242bc3e61ff5b7f3a4c9f7485d47453
font_02_sfnt_off00018649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18649 16064 bytes
SHA-256: f7fb55aa7df24da556f1e6a14ff3e973b5c7274e6851c040e899454d18355684
font_03_sfnt_off00019add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19ADD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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