Malicious PDF — malware analysis report

Static analysis result for SHA-256 330dbc1196cb2646…

MALICIOUS

PDF

81.8 KB Created: 2021-09-01 14:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 07521f1378411b8e6ac71a1e2824136c SHA-1: b124186c51bb238383f998ff7b7a4b35f80d9a0a SHA-256: 330dbc1196cb2646c99b9dddfe43d88db248e36a7ee9da2d4c7a83130c91f265
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites and other disposable hosting. This suggests the document is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.annaleehuber.com/content_files/file/xeravas.pdf In PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/1e41df1b543872aebc57d588ca175fc4/74763098501.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2b992e9954---jajatofonal.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/35302268696.pdfIn PDF document text
    • https://wrd13.com/force/file/86156333719.pdfIn PDF document text
    • http://noithatachau.vn/webroot/img/files/36239343619.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/3722bd6bfdf057c385f754bfcb82fdc6/lejiregafebub.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/f2e9c1b1784ccec086df42d7c2a455e8/73943074780.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/4440dc9702ddf93f33dce8a3236548ac/5661549610.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/2svrtgkar0k2thq0b9u2f1lpho/5161183394.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/pirijavazafozorab.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/212e17f6af71c94acf7b729edf163ab8/ronoku.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/43235296509.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/50876018726.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/powamotemitazer.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/9a3073e340ab3d47e0b13f591e98543a/87462272057.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/13428420594.pdfIn PDF document text
    • https://smartbrand.ro/mm/file/12565457319.pdfIn PDF document text
    • http://allycatering.com/userfiles/28542958911.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/21591929818.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/b965vhkhqar4qqrgsu0pp0vri2/801843719.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed3dd54145---52237136453.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/sopixozisarizaxaviridozi.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/ziziru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=arihant+fitter+objective+book+pdf+downloadPDF 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_off0000d8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D7 17124 bytes
SHA-256: 0af6006035f6a9274dcbe7f90396ce234ff0d647ca9cbc5d02a2891c10ec4327
font_01_sfnt_off0001051b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051B 11044 bytes
SHA-256: ccfa5da9b4dbd1000902cb7ece7d7da0875f7c12e871ae5f26448030fcd0e229
font_02_sfnt_off00011e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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