Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e26253d8d24834…

MALICIOUS

PDF

74.3 KB Created: 2021-09-07 18:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c18de1cd7f008f8a71946bd78528645f SHA-1: 34b739058006d88b08d94bb0e8f6ab1606263210 SHA-256: 64e26253d8d2483417ea44d2cc402bb1d521374ed662fa6f8f48a8308d2bcb2a
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a413c22e2ba---8303075734.pdf In PDF document text
    • http://ldkxzzs.com/images/userfiles/file/voxiwuridotasimuremosavu.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/9f23f14b87b1e30129ff41abceb65ad6/turusefa.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/bd6b566a89dd0a0aa2c9bc8e7b91f85b/4362882691.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/gr8grsmkcph6cq76tpqdvoo3n3/37591042765.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d1a3433a22---turedesotolajezi.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093c926406e9---bakagugilifofusigatofolu.pdfIn PDF document text
    • http://d4storonto.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/mijamixis.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/41213885689.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210611_7CD427A8ED4B456C.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5c14cc192---kifasefuxoselav.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/pisoruzoxomojemududenil.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/alcha6vqo6a105tc7r5gt88ie2/85859810648.pdfIn PDF document text
    • http://sooclose.eu/upload/File/19449748629.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/40960229357.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/f78e9f5820997db3db46c13187e18efa/zanafazetozelukodub.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/83880101533.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/71ee6a9f386139e14a6f191b45608d61/janexiki.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160adad6caa3e8---61428403972.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/norere.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/75956352714.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/9531c6be4fdae416f9ca8b016c15c2f0/mogemulupinemofutudiz.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/e28ea06dfd431cfb92d65e561ab3caa0/51432979392.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/b18e8223e160a7389456e89688e01e6b/19559149461.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=bajaj+pulsar+200+ns+manual+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCDA 16944 bytes
SHA-256: 614535aa85439adc174705327249d82c217f43eade32e2ec86e420aa6a20b961
font_01_sfnt_off0000e90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90D 10744 bytes
SHA-256: 5bb7ba4272df1c35243f3a6440d2adc1aab3b1021c47ec953233ca61c4364c53
font_02_sfnt_off000101d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1