Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9ce84d1b20d3d1…

MALICIOUS

PDF

66.6 KB Created: 2020-12-21 00:22:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5708fe0871b54e05df566fe9b8c6c0fb SHA-1: b927e6bb9521aa45c6149bf5e7e8afc2aacb440c SHA-256: 8a9ce84d1b20d3d10837934a31128e96210a843350ab30c95c10f9368096a8ce
194 Risk Score

Malware Insights

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

The PDF file contains a lure referencing 'Space Force Netflix trailer' and embeds a link to a known malicious redirector infrastructure at 'https://ggtraff.ru/strik?utm_term=space+force+netflix+trailer'. This indicates a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the embedded link is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/strik?utm_term=space+force+netflix+trailer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402745/normal_5f9b753b755e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478683/normal_5fdc1943e284a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389801/normal_5f90122882a9d.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/bomupi/firewall_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/93414466934.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f252e5c7695ca99bde90/t/5fc9939b9309303fb82a1100/1607046043997/wordpress_themes_for_blogs_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18f8d0a2757459be7919f/t/5fcd09df7ae85b53b29639f5/1607272927878/juvazapezidikin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5174de5c7695ca9b695f8/t/5fcbaf7b21c0486e919a3897/1607184252640/purijutujoveminiki.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/zemap.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/2019_all_audio_songs_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC855 5000 bytes
SHA-256: b48e1944db40f1d3fdf76825a699b7c505aa9f79b279b9ba12c330e52571620e
font_01_sfnt_off0000d974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD974 10800 bytes
SHA-256: f7d01e5756271267555f1174978b7658c11aac5c489681692e018640d43cebb8