Malicious PDF — malware analysis report

Static analysis result for SHA-256 5556d07774223599…

MALICIOUS

PDF

84.2 KB Created: 2021-08-16 16:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 776f446bb78ffb3225b20aea23257cbd SHA-1: d4653d9aa8a3c7688ab00a98e556575e50219314 SHA-256: 5556d077742235994b6029be4b7c5fa9b9990919aeb4bd93fb6cef32fce6d08c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. It contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of a link farm on disposable hosting further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://smidgel.ru/uplcv?utm_term=xsplit+broadcaster+crack+2018 PDF link annotation
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9f66715bd---bukozoxa.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/93299601735.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a6643d09e---94955557110.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/mogesamedubikodemuketo.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/luzenamajosato.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/walemofizulijikuruzi.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/36110058355.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/b4e04769f12fbeb618551ebe0f5368a5/govigijalaxakixixozakoxir.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/meberonavuta.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a079fa13582---76896628145.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/71292979341.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16110f86562326---58610134014.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/cdic9bru18hjuadp2grsrfjl5c/golazakakom.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/vunifexutotolatipi.pdfIn PDF document text
    • https://clinicscrm.com/img/files/15550906327.pdfIn PDF document text
    • https://tsegypt.com/file/13131218699.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/e94672dedcf5c7fa9d5e65d4d4a0d7e2/vibobofek.pdfIn PDF document text
    • http://phpirateboosters.com/clients/867602/File/17407800701.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/42770544650.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/xagiti.pdfIn PDF document text
    • http://bmhs1964.com/clients/a/ae/ae3b7fe25fc1fd458a9bccd7578bee9c/File/87877130925.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/5863aa9f7c9b3c3fbc6a4e72bef56ceb/lizex.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_off0000e525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE525 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3C 11144 bytes
SHA-256: 7701d903df6e83c82a803686056c13da41f660b09ecac0b1d56e899608cb0198
font_02_sfnt_off0001173c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173C 16496 bytes
SHA-256: 75228a00ce4e9f2f7370a7aa1e4ba39c0d17de6a9c6f16b11e1b2b3a47d885d6

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