Malicious PDF — malware analysis report

Static analysis result for SHA-256 47084d8b0eb424b6…

MALICIOUS

PDF

85.2 KB Created: 2021-07-16 05:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 47e8aadd5486087b8985aba7864c7745 SHA-1: c861617d618b11f4ccb4442b19907131431d7f65 SHA-256: 47084d8b0eb424b6d0868baea59df592554ba2de1567e0df88b5eb84585c2a0a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a large number of external URIs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the nature of the heuristics suggest this PDF is used as a lure, likely for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://coretry.ru/uplcv?utm_term=a+love+letter+to+you+trippie+redd PDF link annotation
    • http://gocreate.termall.pl/upload/fck/file/75260432867.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607808521d964---vadekukawoxuf.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/f0979f0140e7ae98eb35fd7250cf94c5/komogi.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078f526d264b---30277055421.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/86300615297.pdfIn PDF document text
    • http://womenscouncildallasarboretum.org/clients/85748/File/23677154842.pdfIn PDF document text
    • http://uco-kampen.com/media/files/33491970249.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/xereniwi.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/ec62226349932641592f1520fac8c9b6/novelawilikajib.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa4f6425ca---senibosabuzumeditamita.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/fivowapiworaze.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/fokanumusozi.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/a1f2c0d39a6988e51cdd23b34e7e8c15/fazenilizawesusalizuxok.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/wevuve.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/wuzafuvis.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/32044106166.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847906bee4a---99124836620.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/dawojakitenogowaj.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160e496cb9d502---rakoluzetezovemutitit.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084d2e0b9800---58047986670.pdfIn PDF document text
    • http://islandpointfl.com/userimages/94155080966.pdfIn PDF document text
    • http://samtekelektrik.com/files/mujogesaxamumevix.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/97282116748.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_off0000eb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10347 17684 bytes
SHA-256: 18b0c1f9925db42f0b7d929a4ad8ba9647e63aa89c4f91162e876a9223c44426
font_02_sfnt_off000131a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A6 10212 bytes
SHA-256: b34245e1580d1f11adf03f5ec10fff17729b1de2b466270e1a787032f49ca780

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