Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce48363443e419ae…

MALICIOUS

PDF

70.2 KB Created: 2020-11-24 02:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c8abfb076619a78c3d95f64b032b95f7 SHA-1: 11d472d700e50df38900d555e0646aa095503a38 SHA-256: ce48363443e419ae05ea2a977386752bdf43782f1acd010c32b9c14632a3b7fc
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with a critical heuristic firing indicating a malicious redirector link and a link farm. The ML classifier also flagged the PDF as malicious, and ClamAV detected it as a phishing trojan. The presence of many external links suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=the+nithing+witcher+3+bug In PDF document text
    • https://sazinuje.weebly.com/uploads/1/3/4/5/134588850/ninisubi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424043/normal_5fb99b6e93e1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452377/normal_5fbc37e40c51b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491925/normal_5fad5e3259b6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_5f92675fa49f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405419/normal_5f92e8912ea5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458428/normal_5fb019779b48a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386842/normal_5f8de87522dfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413117/normal_5f9c2ee6354ed.pdfIn PDF document text
    • https://jutovadisew.weebly.com/uploads/1/3/4/7/134720627/f4ef15fe3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494657/normal_5fbc3cdc30dde.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fb70a22-5e09-4eff-af0d-0f7ad3fb0713/bilipakikevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bdafe68-9b53-43b2-8dc9-d481c847640a/when_do_jim_and_pam_get_engaged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49fd43d7-b2fd-4733-96c9-b4b91ad473ec/57575104240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ac69433-c4a5-4e4e-9674-81dfb54714e4/tobevuvugasabemup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bba48e9-a71f-4785-b0a1-d00bf8aa718e/69581738302.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA23 3928 bytes
SHA-256: 872e017e8afdf229356a8c09f85ad61d745ff51270ac97f228257b581ac4edfc
font_01_sfnt_off0000d808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD808 4984 bytes
SHA-256: dc9810293a29624704785f1d2f03a90d43006636c23b50a45799f8ae1f57d8d9
font_02_sfnt_off0000e917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE917 10072 bytes
SHA-256: 611b33ae950181f10bf0699761111c9369add4fe07fcfafe59dd6d700acc900c

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