Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d32b2df9743b62c…

MALICIOUS

PDF

68.2 KB Created: 2021-09-05 01:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0dcc0d85ec51ed9ec20c64bb80131033 SHA-1: 0c76254fba46e02485d20a9e560042663a99eb51 SHA-256: 2d32b2df9743b62cc0ad7697dbb78f46145d8e14f46cb7ced5a90f25272f5214
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure with an image-based overlay and numerous embedded links. The heuristics indicate a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing sites. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c59296f45---94673007045.pdf In PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/pedulorovegujelinumiwig.pdfIn PDF document text
    • https://banghenails.com/upload/file/47110872279.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/35241673271.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b3d5a0d13---kazezelama.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/87952652726.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/17a5a42e1e14e4f001dc8457eb0c5841/98608697388.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/nesenimewimite.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/jezibixakoxukibalapivad.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/lerojojixedamedaguza.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/73125250383.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///wedisesinolafugun.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/nezanixuduxozem.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-7/file/55367842127.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/82999162631.pdfIn PDF document text
    • http://pnalog.ru/images/file/vajidifo.pdfIn PDF document text
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28375101984.pdfIn PDF document text
    • https://matratva.in/userfiles/file/kesij.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117990782568---10729691504.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/54126992733.pdfIn PDF document text
    • http://dentali.cz/files/files/10536300912.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/47512185554.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabd4c80f1e---20996901179.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=ayurveda+books+in+malayalam%2BpdfPDF 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_off0000adf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC60A 11056 bytes
SHA-256: a158151ba54bdab14d35f2898ec8188bece8700cb91ff01ac6469f68c874e013
font_02_sfnt_off0000df8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8A 13848 bytes
SHA-256: 2c48b09411b14b3f2ed9f5125d5e16422a2e58f86fd73c3a1e7d8932b2ef1a54