Malicious PDF — malware analysis report

Static analysis result for SHA-256 d063878ddd3a9e5b…

MALICIOUS

PDF

72.5 KB Created: 2021-10-01 03:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e57b65aa07f985d0bf9c617613c692ec SHA-1: ddd1a74ae6416c1f36817268b5a041550441506c SHA-256: d063878ddd3a9e5b219531bda65ddee1d2b8eb4e38ca0d61ccbaf65464fb611a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://pixomot.ru/uplcv?utm_term=play+online+fall+guys PDF link annotation
    • http://atreve.eu/ubezpiecz/obrazy/file/goxuvutowetej.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/tojopilexojixejigimak.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/79245082968.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210925230236.pdfIn PDF document text
    • https://srsatta.com/ckfinder/userfiles/files/femopaniruzapuwuwitawavom.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/13774794879.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/wewagexewarofadomazi.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/39534794073.pdfIn PDF document text
    • http://jj-metals.com/userfiles/file/2021092915351373499.pdfIn PDF document text
    • http://springgalleryng.com/Images_upload/files/64645569202.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/d00c7484b2250eca86ced79226efd475/zidurijopijofalapu.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/jonep.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/54156126391.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/83a0qo1mfosdo3vavijpp435j3/nuxafet.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/lowovijege.pdfIn PDF document text
    • http://cloudinfo01.smartevolve.com/images/ckeditor/files/kebijumusipatesaredaveno.pdfIn PDF document text
    • https://sakesushimn.com/userfiles/files/42075553049.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/6go3tvogk3ds7nfkm03r2vc6h6/jumakepobupolatofove.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/47255083428.pdfIn PDF document text
    • https://holcom-wd.com/webroot/img/files/totetoje.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5pc6j3lm2mnlc1o9500l0brvk4/tusevopererofoxorasovaj.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/sarolabezuxevotila.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/gizobovitulerobej.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/46759706384.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/liraf.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_off0000b8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8AE 17132 bytes
SHA-256: 398e806f09d3ae5453962033ea3018e443d5a60659f6f61e2ff729bb7117d52a
font_01_sfnt_off0000e45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45B 10408 bytes
SHA-256: c66250aa00ccede4102bc8876bf74cd147da61dfe19015e82f60da4bdab3df7a
font_02_sfnt_off0000fc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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