Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea1cd76c3dc0e43f…

MALICIOUS

PDF

87.5 KB Created: 2021-09-02 11:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fbdf21b06cf8836fe9bda30af0b99f06 SHA-1: c04cd0134c1c9c63b5d59ca5d51f3dea6b8d4fb2 SHA-256: ea1cd76c3dc0e43f0d94715ac8c61562b2e3a1afa602349482d4bce6c75ee486
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised websites and disposable domains. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ijaetis.org/ckfinder/userfiles/files/28288761089.pdf In PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa976b1755a---22962505960.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/94070382661.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097116122e2a---51959394403.pdfIn PDF document text
    • http://webbuilders.com/files/file/nenakifajuxubijewolo.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/6mu7e0m8setku3jdtcm949vj75/27820164302.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/binulumepewamirakapak.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/11557257812.pdfIn PDF document text
    • https://ebooksweb.net/files/file/vaxunedudebarimanogula.pdfIn PDF document text
    • http://licausi.it/userfiles/files/vevati.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/xeforuxugerop.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/210710053005602207i8cky.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/ramejumodizebulon.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/42013456923.pdfIn PDF document text
    • https://openkomm.yussfone-crm.com/userfiles/file/xakojuki.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610513062f83b---xabazezefesok.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/juxani.pdfIn PDF document text
    • https://razredna-nastava.net/files/mopumesafujunexudoz.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/11057698173.pdfIn PDF document text
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/45565710631.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/d74ff57da8dcefbc43b03dc6d25b4e27/36325255476.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161235246f0284---fajorigerabebusabenutibeb.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/48227836572.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=articulacion+tarsometatarsiana+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_off0000e858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE858 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001006f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006F 10864 bytes
SHA-256: 207a98b2f425b06846b35dbb25b3fd57fb47d1e760d2df8e45e5cc3fcf64482d
font_02_sfnt_off00011983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11983 21848 bytes
SHA-256: 39ae41ded2c3f5f6b67c64faa591a0c0912df4e18a53b8c1fe35c9f8b8916cd3

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