Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce19e2458a76d7a…

MALICIOUS

PDF

73.2 KB Created: 2020-12-23 00:52:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d821ffb0c965e5e724387704f062e1ea SHA-1: 90ddb26f6bedc6e59cf2a3551f4edf4a574cd21a SHA-256: 3ce19e2458a76d7af00871fcf5ee4736def8f00a9af6a663d77b1c4f31f9c078
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=how+to+add+a+gif+to+google+slides PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371010/normal_5f9652f7d7c88.pdfIn PDF document text
    • https://vixeroniwemeful.weebly.com/uploads/1/3/0/7/130740086/0c93cf830ecdcfb.pdfIn PDF document text
    • https://lumovomudin.weebly.com/uploads/1/3/4/7/134704265/4618142.pdfIn PDF document text
    • https://faxitovi.weebly.com/uploads/1/3/4/3/134379512/031aebaae83fa8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417535/normal_5f9a5844e8516.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/nenolidonuriwipemu.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/kuxuwalibo_nosave_mekexipakuxelog_tepufetake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f90624918ecc.pdfIn PDF document text
    • https://weropejo.weebly.com/uploads/1/3/4/3/134321986/lazoxawuja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384048/normal_5f98d2bd6fb36.pdfIn PDF document text
    • https://zozigowava.weebly.com/uploads/1/3/4/3/134387142/3618052.pdfIn PDF document text
    • https://kiseridebajesa.weebly.com/uploads/1/3/1/4/131408791/sipasolekudozovuxib.pdfIn PDF document text
    • https://pepadamive.weebly.com/uploads/1/3/4/4/134468065/baripasow.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/5166562.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0fe012e537a05ef0995e2/t/5fc278499d79364840dd70f2/1606580307979/28794759654.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe11ca5105b8f45ddd1d73f/t/5fe1e6f22eddad3b3758bbcb/1608640242502/deaths_in_custody_reporting_act.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_off0000cafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFC 5032 bytes
SHA-256: 2288d725eb76f5b2f03c6ec99d9abf7995cba5f72961a6097b7d75076c1a07f1
font_01_sfnt_off0000dc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC49 10988 bytes
SHA-256: 10fba80a32a043a5be6d73b0e3bd7c4b18ca5731899f2a69deaebb95821a7a33
font_02_sfnt_off00010204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10204 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0

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