Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc3390bcad3da41…

MALICIOUS

PDF

76.4 KB Created: 2021-09-01 11:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4f679530de602aea80ec2e156b14e5a4 SHA-1: 224293af2331c02da407edf3973717d296d37e4b SHA-256: ccc3390bcad3da4101444e2871fdf27f1fffc6a4a2042ff682f13c9372a8a5b7
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised or disposable domains. The primary purpose appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://ordinate-ltd.com/file_media/file_image/file/vetubeseperigumibed.pdf In PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/0c9674658cb7f95ba29ca170ded06715/giguvorivuvivepivav.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b385bab80---7478924438.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/danemiboxopawufefi.pdfIn PDF document text
    • http://strandedtattoo.net/file/koturidoxuzavotetabur.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45e04dd3b5---17508780722.pdfIn PDF document text
    • http://jp-cable.com/d/files/siradinaremejusixidufi.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/bulon.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089af85a84be---gowilekajerimozo.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/08/16/xogazonutat.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/witukebib.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd84f99f5aa---14471186571.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/62ohk733riu8gkqd8ljeagq7p1/99384003877.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/161010803485f2---61220659723.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16096c357da121---61421413329.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/tizeriguwujobuse.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8b8678234---xozatovuwe.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/vogukejuzip.pdfIn PDF document text
    • http://itfkarnataka.com/cvsprojects/SSK/Source/2.0.0/images/files/66848543073.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/676edad57cf71d2304fe660a68a20b8c/moxireku.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/d594b1d8d6ab42227ee196dc69c1a0f8/94113364049.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=types+of+archaeological+surveyPDF 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_off0000c851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC851 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE068 10800 bytes
SHA-256: a493fa174299c34a51281d11dce508ec013166ad8e16921caea3574d5f1fb60b
font_02_sfnt_off0000f97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97C 16568 bytes
SHA-256: b8a892138703c8d5e96f9e64feeaf3637139d701b9e32a15fbdc410013cde46c

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