Malicious PDF — malware analysis report

Static analysis result for SHA-256 4130ab7d51575809…

MALICIOUS

PDF

79.8 KB Created: 2021-07-02 00:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1e8ba24c8f8113a3b0eb137b59b7205b SHA-1: d46fcdfc4c525c668c84400376c41e4af6d2aa0f SHA-256: 4130ab7d51575809f166bf212ef12667730d807445ed80539ea1b73103848523
144 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded links, many of which point to potentially compromised websites or directly to IP addresses. The ClamAV detection and heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, providing no direct content clues, but the link farm structure is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0190

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://inwebjor.ru/uplcv?utm_term=pirates+of+the+caribbean+2007+full+movie PDF link annotation
    • http://tgtech-auto.com/userfiles/file/21381805595.pdfIn PDF document text
    • http://ahchala.com/img/file/lovutemaropomeliw.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cec87041fb2---pavajajiv.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c7c6e8ded---lebezupumunolim.pdfIn PDF document text
    • http://cartopack.com/Images/file/70441353922.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/242953a0ced406ddf7ee25e28fe68eae/84784266205.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/54619574910.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/80714760433.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851d2f29c1d---dokileminaxil.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/b30d31d05c85ec53fe3bc3ae9e1965cd/subuxuli.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210603_193444.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/fc3c2602bba1bd1aa5b7ee9708b88660/fadubesijaz.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1609b69441f680---nanuratapolafipujidozofa.pdfPDF link annotation
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/6c56ae9fa9a0eeb10eafff59124d92e6/rigizulunanulolodolupu.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/gj7cldadif39c2khmptvj0a3g3/supogi.pdfIn PDF document text
    • http://dzbnf.com/upload/file///gasekunudipuvete.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/rasoroxuxipidovumoradej.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/suvajulumunowubitop.pdfIn PDF document text
    • http://paletydozahrady.cz/ckfinder/userfiles/files/17206631507.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d202325e60---wesofumaxin.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/vabojipasapedemetu.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/xelivobawepetefim.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/dawurujimuxesejum.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/s2i2ds5lsp1lnmgid2dd7djipc/lanikozagorisimabebuz.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d2b092e60233d3c9d33acdf8fcce9c8f/93724172657.pdfIn 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_off0000d943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD943 18396 bytes
SHA-256: a9d349b057f9eaca67aaf3fcb75031a8a3b53c975faac6d06764b02cf2e6117b
font_01_sfnt_off0001089d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B4 11200 bytes
SHA-256: 171ad30c802fbe885ee73a8fc7e24d747202c460757d5ebece92c4bae42dec54

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