Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b2549829a475a8b…

MALICIOUS

PDF

74.1 KB Created: 2021-09-18 02:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eee54a81e1b57b85b40cab2fc79dc65d SHA-1: 279db341082b4918c0bedb87a5648f23e7623df4 SHA-256: 3b2549829a475a8b503753d4f3fed0ff640114b21c67815455a565a4ce8af2db
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous external links, many pointing to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of a visual download button further supports a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=paid+app+for+free+apk PDF link annotation
    • http://arqing.es/ckfinder/userfiles/files/rimelefadafimorupasevizu.pdfIn PDF document text
    • http://zechnerbau.at/images/content/files/82614156161.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/fm0u1vlgpf42l49anv8mv54635k2v3pe/76170461509.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210918061019113.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/299ab96694461ccf9d26dc5b40fd5f14/lefunusos.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/noxujaxepezax.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/furunigivemanadu.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/zevop.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/85247291039.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/megubarusatife.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/kebezimimitow.pdfIn PDF document text
    • http://ms-krmelin.cz/app/webroot/files/files/26207473852.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/24815056524.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140cadb38c51---68757397494.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109081722319630.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/wugemobun.pdfIn PDF document text
    • http://epicridesnepal.com/files/20154067414.pdfIn PDF document text
    • http://unibox.lv/files/text/39520938362.pdfIn PDF document text
    • http://dnt-mayak.ru/content/File/85864773119.pdfIn PDF document text
    • https://subded.org/userfiles/file/mareginovejufogi.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/rawelotoramilorub.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/86492937430.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/nolaluxozon.pdfIn PDF document text
    • https://securitydm.net/slicice/file/64721838547.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_off0000bf63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD775 17336 bytes
SHA-256: ac41311da2b27630a3582e7cb60bb2bde4175fc98ff7b9d7803b30bf57bc16a4
font_02_sfnt_off00010464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10464 10168 bytes
SHA-256: 8bc66aeb56ef1af76e04f81f339409cf385412f15fb1ad01432d7c5e552db522

Open this report in the interactive analyzer, or submit your own file for analysis.