Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c75273ccaa22e1…

MALICIOUS

PDF

81.1 KB Created: 2021-09-07 23:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9fe303b81b23d572904d49e99cc9d16f SHA-1: 3979890d9b693dca59c11b00a14d1635fab8f378 SHA-256: 69c75273ccaa22e18b421908baacb15336b53f529ca4624d56169dd76dd8bb46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload directories, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external URIs and compromised hosting points to a redirection-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://crysiq.ru/uplcv?utm_term=mla+cover+page+pdf PDF link annotation
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608870990b6bb---gatiga.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/1c8945c7c239d03552ab56d452114939/24955301876.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/11710291980.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae4b5221ed---bonuj.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/5acf53342aa3608bd8899e7f155d7213/32612603809.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/74594542600.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/ff5f7ac97ddaa7cc94fbc6687e779ec0/vegamolabufi.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/a19gq7duqe39vg5qeb90gkcood/bedepa.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/c317395b639d54c14b9f3146e74d5e03/lavebifaxo.pdfIn PDF document text
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/jikugatogebez.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/funof.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/tovanotefirabel.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613745887d48c---55849491568.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/ruloditamidowakevodap.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16119fee194f48---84108931325.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/tirixar.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/dujegavokiwaf.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/sivug.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9146223850.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210508193520_1057934820.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/lubotofovizowu.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/votuvozuxositaj.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_off0000da37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA37 17596 bytes
SHA-256: 14553c18df76bc6fad2dc81eb2e4255a3d892392f4b751336b5d6dc1ef04908b
font_01_sfnt_off000107b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B6 10392 bytes
SHA-256: 72721a9f14a1d4d762877f87c1b7b2bbbfb83daddae7ed9e1333af2d2f453526
font_02_sfnt_off00011f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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