Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6ce0d5b971b13c…

MALICIOUS

PDF

113.2 KB Created: 2021-08-03 07:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 06cfe5e05ea9caa4ee2c14df092b47e8 SHA-1: da34dcabcde9ba9c60f46940e5706759d3027983 SHA-256: 2b6ce0d5b971b13c74a5e7af489eece0c2bb3ddaece4552b146a04c26e6da4d7
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document exhibits characteristics of a phishing lure, specifically requesting sensitive recovery secrets or private keys from the user. It leverages numerous URLs, many hosted on compromised CMS upload storage or disposable hosting, to host or link to further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, aligning with a phishing or trojan delivery pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://coretry.ru/uplcv?utm_term=blockchain+for+dummies+pdf+free PDF link annotation
    • http://aliglobshop.com/userfiles/file/32299495589.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607356b728419---musivujaxa.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8a09432243---32762283458.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609600e02d9ce---fawukaraxajumel.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/90087745338.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/rvlsi9bfu7j0ie4uodi6s5p1u4/46584451278.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/xobakap.pdfIn PDF document text
    • http://lpsa.cz/userfiles/file/27320236819.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/9667112978.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/49164088892.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/0istoi8lpt7t76jdn8nme09hht/87824920539.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/79072364937.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/raxupux.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/sedesigerotexegefun.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/zekuribivodeliwixuwogef.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/memifafusudusifadinini.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/vazukajuk.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/razufewebunexumexibuk.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/jizadaxupuperamugumu.pdfIn PDF document text
    • http://ecole.ru/text/images/file/89897146431.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/otu00slotic3v1sf47sbl4g2j1/14492851975.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/033e48c0c3cab28040633b4ca081bc44/gisivorixek.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E88 1636 bytes
SHA-256: e3a1ca7fbcde87b6e2bc585668cff1a50452d2a09c95c546c16e9f90aebd6500
font_01_sfnt_off00015655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15655 17840 bytes
SHA-256: 501d1b0db0e8e0ef521dbd52b5fb9b420fb2d7031528d8ea0ac10ee109576495
font_02_sfnt_off00018522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18522 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00019d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D39 11032 bytes
SHA-256: 3d8e90533f779b2a36d8d2bfaa9ff84d8fe9437c52d221d4a7e26ed551842e59

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