Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0664f03f08f9028…

MALICIOUS

PDF

92.4 KB Created: 2021-03-25 01:33:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2ad9b2ba33794baf60b74a4514e7f1af SHA-1: 95b7bb526d9b3da9193fbe2cd6427302188c4f41 SHA-256: e0664f03f08f902887ed069b65e610f214eb56fb93e951e547e7a9575fa3c8f0
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed for SEO manipulation or to redirect users to malicious sites. The embedded URLs and the PDF structure point towards an attempt to exploit users through deceptive content, likely as a spearphishing attachment.

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://gimoguvi.ru/wix?keyword=teeth+mary+otto+pdf+free+download PDF link annotation
    • https://nigukaxo.weebly.com/uploads/1/3/1/4/131453065/7680852.pdfIn PDF document text
    • https://kujedoduzenawo.weebly.com/uploads/1/3/0/7/130776750/c164b.pdfIn PDF document text
    • https://gulipuzajetag.weebly.com/uploads/1/3/5/3/135397689/532377.pdfIn PDF document text
    • https://lijiwowotu.weebly.com/uploads/1/3/4/5/134587055/316da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384822/normal_6054535ba9eaa.pdfIn PDF document text
    • https://gabofulonu.weebly.com/uploads/1/3/4/7/134730366/zibuwobovekila.pdfIn PDF document text
    • https://kuvijoxujav.weebly.com/uploads/1/3/4/2/134266993/wefodotawu-xuloje.pdfIn PDF document text
    • https://wedabivugexum.weebly.com/uploads/1/3/0/9/130968949/c192d2267.pdfIn PDF document text
    • https://fikenetefi.weebly.com/uploads/1/3/4/7/134771518/08eb4e477686e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416923/normal_60450c1e900e3.pdfIn PDF document text
    • http://potolkilife.ru/36334049853k666m.pdfIn PDF document text
    • https://ginuwedisifixel.weebly.com/uploads/1/3/4/7/134744372/rurolapapiwiden.pdfIn PDF document text
    • http://tehnikator.ru/miromar_outlets_hours574kh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_7ae05595da594866b6f7a9f1aa44d378.pdf?index=trueIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_ddd3b1290c82464abb3fb2f90956b159.pdf?index=trueIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_8b014008b15c477fa325b1f84c73b6d6.pdf?index=trueIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_bc6c2bdaaba04ef6843d75232bec7ef9.pdf?index=trueIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_84ca9ad738364f0790aa227f98e2281f.pdf?index=trueIn PDF document text
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_ca70aa32484e43bbb28c054a8b326d9b.pdf?index=trueIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_20c365c470e4463bb1235c3473143c71.pdf?index=trueIn 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_off00011778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11778 5248 bytes
SHA-256: 59078dce48acf8ef402b67b7e933df9c75f509ed52d01d86d1b7e12b36c314f2
font_01_sfnt_off0001293c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293C 11052 bytes
SHA-256: 5a886dfeda62cb58f8aec7adb99bd25b7b322a7e11f7dc9b22b7980eb606991a
font_02_sfnt_off00014f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F20 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073