Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ababa14a29890ec…

MALICIOUS

PDF

85.8 KB Created: 2021-08-10 15:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 58d1f77db431c6eafbc05e2a52572f94 SHA-1: a747be13cf74426138fc02af5aa3de2f21f3b375 SHA-256: 4ababa14a29890ec70f0a378dd1077ca7f68e7920f8a69009c71320e850b79fb
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, indicated by the presence of a 'download button' heuristic and a 'password-protected archive lure'. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting an attempt to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a dropper for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984efb6d115---50483290539.pdf In PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/630ca72db6424f8861d60f4b96169e5b/43829241404.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/bowevig.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/36829482040.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1b471be2cc---buwiropakokugudelanosa.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/nesofofubanura.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/te8m4a2ajb7v0bbm7gocg1b4d5/75208894143.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff6bf7871a---sisemepugokaroza.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6ed762dd1c---dirawuxudiremuliparo.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/0e1c67dfcf93c8812c18342395ca32e0/wiziwatitikubuwuxuwosu.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161077fc79ae62---6493464535.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9ce5d7ec0---bidofe.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/l9v7t8i3kns1j1ea9olb3bn7b3/pexibipabogurimog.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/zutewa.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/kalanabinezisimeve.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/firexibokeraxapajevomuko.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7de926d60---46241666543.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf2a133d68---72724780824.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/kipasegudegodidijan.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/q5rrlr3gkg01sh5875bohl8pg6/kixonafexagenatoziribixun.pdfIn PDF document text
    • http://vdtonline.vn/static/uploads/editor/files/46279389610.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/228804e35887600d066d431debe11668/37130759428.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/b2tjb67rjhulfqduiu749nnabr/22934501119.pdfIn PDF document text
    • https://avenue102.com/uploads/file/878348037.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=dragon+ball+xenoverse+2+psp+free+downloadPDF 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_off0000ec1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1A 17120 bytes
SHA-256: 77edd28d7d5a8aa5bb815c7cde8b397b09482c1d82d5a3e0881edf572872a2c0
font_01_sfnt_off0001187e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13095 10996 bytes
SHA-256: 090a99f90970485dffca837261d5c3872fe6e99331fe9f4e5fa67945afeea6dd

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