Malicious PDF — malware analysis report

Static analysis result for SHA-256 77fa983342002879…

MALICIOUS

PDF

63.8 KB Created: 2020-11-10 03:10:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 71d638d2bf29481907a5bcf77a04fb2e SHA-1: f5197c1535ffdf94da40f4b6625e879f546a158f SHA-256: 77fa9833420028799890dd548822eb37a2c41283b2296c5b39a6f2a74471b691
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically to a URL containing 'popcorn time apk'. This suggests a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://traffmen.ru/wb?keyword=popcorn%20time%20apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_5f9f064f8131b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f8bc38ce4ed7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5f92c13381d28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f8745dff2371.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/vikukinumet/mofabutawax.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/zanawafubesopobi.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/zudalolubafaxozudasot.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/shopping_cart_hero_2_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/32047309173.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/niberosijakibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f29c7e-fb83-47f7-91c1-f575316b054e/29739776603.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_off0000c01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC01F 4936 bytes
SHA-256: 800e49dbafa56852193d33a9b0e0293a3164b3d87256bdaf429403c0dff131ae
font_01_sfnt_off0000d0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D1 10084 bytes
SHA-256: cf1f69de5280ec6323be55cb2e0f446d5fb105c97d8cc0381d476c23df037a0f

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