Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8f755e944c6c47…

MALICIOUS

PDF

87.9 KB Created: 2021-09-21 07:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5ad45cd67c56411db8589418c2861a54 SHA-1: fd2441c69225eececf89acc922a71d32bf525455 SHA-256: 5a8f755e944c6c477214a6c1c5fc24af092e4664e00a4a81178682ff136bf599
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to disposable hosting or compromised WordPress upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://compow.net/ckfinder/userfiles/files/setunupekeku.pdf In PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/buxurebip.pdfIn PDF document text
    • http://preiss.at/upload_files/files/lerufaz.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/42354946634.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/96131088780.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210916/file/16317892308263.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/16cfdd75f4b787d03ba10517f517a36d/17898960982.pdfIn PDF document text
    • http://nollve.com/img/editor/image/file/luluxigapixupejubiwelik.pdfIn PDF document text
    • http://www.klimavill.com/data/editorfile/kebiwejum.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/levafuwubapudak.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/ni0t0brvnkab9vmett5fefhi23/bapoweleropokexuvaz.pdfIn PDF document text
    • http://abwwilson.com/uploads/files/sovajozaxakelawamigol.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/81879320940.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/161379c9fe5fb8---64298538763.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/69717591415.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/4321024054.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/devilaka.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/94654492939.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/sibosujibolemuwosim.pdfIn PDF document text
    • https://neksav.com/upload/ckfinder/files/57087297905.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/85931040384.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/69560603858.pdfIn PDF document text
    • https://badrivishal.com/media/feduxij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=games+of+thrones+putlockerPDF 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_off0000f30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30C 10884 bytes
SHA-256: 0c04c896f67b0f2d3dbace5c60375cbba1ce3950c56223cbfa238e1ef72a5101
font_01_sfnt_off00010c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12430 17620 bytes
SHA-256: 1a4e6ea295bf23014830adad87daab955c261fd2cd82e3b76237fab1340825d2

Open this report in the interactive analyzer, or submit your own file for analysis.