Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce463d752d3b956…

MALICIOUS

PDF

90.8 KB Created: 2021-08-28 22:36:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ab1025b296bd000ea6426e3bca754eba SHA-1: 69fe7ef2a4cb8e60551c20202c312e454f46591d SHA-256: 5ce463d752d3b956e73776d598552b5cda6c1ef173524886349884490ccaf8a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites and other domains, likely intended to lure users into downloading further malicious content or visiting phishing pages. The presence of multiple external URI heuristics and link farm indicators strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://armagedonspedycja.pl/files/file/81049254471.pdf In PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/gabusabulubusemenivimazu.pdfIn PDF document text
    • http://suttonoakfarms.com/clients/880813/File/76841503067.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/c78fe94cc44de88e391c02f4c228c33e/18381354112.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210623021231.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/9n4sg8s2em583891qii4cpi2s7/gujuzilawonude.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/53902775432.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/88676262814.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/bugitime.pdfIn PDF document text
    • http://suphammamnon.org/uploads/files/91624590077.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/83454706684.pdfIn PDF document text
    • https://c-effeimmobiliare.it/file/73341244751.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/vabifatedisuxugotutifi.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdd060418f---62537443590.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9988b803c---40072985225.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d64b44c8484---6719671069.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/df68f404b8361d4ff43841ce160b3bf1/gavujiximamevopofejafeve.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/83333286344.pdfIn PDF document text
    • https://cutandcolorparrucchieri.it/file/98308939190.pdfIn PDF document text
    • http://nessium.net/userfiles/file/maripebosiv.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/616f4fc54edaf6c2d0cf2dc2a782a6ec/fovepisaserusigav.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/tolevubugek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=loomis+planes+of+the+facePDF link annotation
    • 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
stream_006_off000141aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x141AA 17876 bytes
SHA-256: e7e7cb1430ebca1ac444ede34f6f92244b8a19c80c44b32e8f2b3d891e4f2973
font_00_sfnt_off0000e3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DE 18060 bytes
SHA-256: 493101a13fe839bb33bb5df628eccbf021a42c3ad26cc199274067dbece5ff2f
font_01_sfnt_off0001118e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118E 10604 bytes
SHA-256: 2ffb4f6f58b8174ba12862aeea87e39d622e49db208b38358244e99869715622
font_02_sfnt_off00012999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12999 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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