Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ebc561256e024d…

MALICIOUS

PDF

94.3 KB Created: 2021-01-15 07:02:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 95599b3409bc07f3b6763b1f31b38465 SHA-1: 7bc966323a89d12d832b6562053af1f48732b90b SHA-256: 06ebc561256e024dbb8f3f6e7cde548b4747c7c1ead9f056df5ffb18efa75d8a
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious redirection or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/aws?utm_term=birthday+wishes+for+wife+images PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f8c9b4610520.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/53aac7dd.pdfIn PDF document text
    • https://fupopafesuz.weebly.com/uploads/1/3/4/4/134443157/gawemulasuto.pdfIn PDF document text
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/motited.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447916/normal_5fcad21a70ec6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5f95181f42faa.pdfIn PDF document text
    • https://rojumiladikeju.weebly.com/uploads/1/3/4/3/134315163/c0af70.pdfIn PDF document text
    • https://site-1175399.mozfiles.com/files/1175399/xetubisaxafuta.pdfIn PDF document text
    • https://tenivutod.weebly.com/uploads/1/3/1/0/131070705/kemegigasufirukovub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486743/normal_6000f2ee29de4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/icd_10_klasyfikacja_zaburze_psychicznych_chomikuj.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/auto_clicker_apk_pure.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn 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_off00011c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C53 5532 bytes
SHA-256: ee24f5cc4eea605ccea14bf5d765d70db6a73dc7abf7109b21c33eb974c05137
font_01_sfnt_off00012f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F14 11736 bytes
SHA-256: 61584064fcaf3549529514bddffed1f0e65f37703f2aa6ae1fa557b9ffbcc9b5
font_02_sfnt_off000156af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156AF 16140 bytes
SHA-256: 3f83bbfb2e03141a9083badfb1da6e2b1773f9aa6b1ed8f30fc2d392a5ee3553

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