Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67406d3ffabfbfc…

MALICIOUS

PDF

76.1 KB Created: 2021-05-16 13:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de621d5bb92941b4bfa2683fd7974914 SHA-1: 0e02f9607005844e93f1b39e50d66fa50749731e SHA-256: e67406d3ffabfbfc2be83af13cd827f802e87500e17eb044ce4028d1c29e2874
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a malicious link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting. The presence of a URL with 'utm_term=android+developer+job+opportunities' suggests a lure to attract users interested in job prospects. While no scripts were directly extracted, the PDF structure and URL patterns strongly indicate an attempt to redirect users to malicious content, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8759

Heuristics 4

  • 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
  • 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://smidgel.ru/uplcv?utm_term=android+developer+job+opportunities
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/80a1d876c13b8050c2854da6ec9f055e/71310722318.pdf
    • http://aldo-ins.com/userfiles/file/kuzatevokeveku.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/95f33048c0e2645bd7792892a1a8a5c5/gozodusaxezedofuvedisut.pdf
    • http://anthonyvienna.com/sites/default/files/file/dojunagitorokoni.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ca1d4eb38---duvavisafazofajasasi.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160972b4c6157a---gavida.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/e1ea2f0096233db84e901a3d2a352757/82818761167.pdf
    • http://yuha.be/_files/file/51714223816.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4ce6a1c5d---girebegavitaxogijikitataj.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ffc85fb84---906979628.pdf
    • http://ghalemdi.com/userfiles/file/84371948509.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/c4d01f9cc9dd67429cfee500fe412861/fewita.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/01e7831a7cabf0ca4ceca1ec0e902f27/96228035812.pdf
    • https://akproauto.com/nbloom/fckuploads/file/36958828265.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/60af0e4191791ecab9055a9777118053/kamaforuvowesa.pdf
    • http://bigxra.com/uploadfile/file/2021051110453273499.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faec.bin
d95cc56b596649c19bfe9c595b7f090aba233dac5a2a95c1841088a6c2bae3be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEC 5008 bytes
font_01_sfnt_off00010c04.bin
86dbfed55cbad2aa7ae8f6c6cbbe8f4c7dd917fb029910334ab8a57628abb1b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C04 11204 bytes

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