Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6388fe848de31ef…

MALICIOUS

PDF

66.3 KB Created: 2020-12-25 09:39:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a915187e6467d61139aa0e4b39ffaa7f SHA-1: 8a026b0c9d8bd6f78135b3e5e6f61e50557d542f SHA-256: f6388fe848de31ef583742b78e86c0d1c8cfc5f0cae8da156671169f34e9a216
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of a malicious URL is a high-priority indicator for a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=the+strange+case+of+mole+airlines+flight+1023+report In PDF document text
    • https://static.s123-cdn-static.com/uploads/4459641/normal_5fe57af19a5c5.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/cjbvjdG/luwaludogomaraton.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_5f8e29fa1fdae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388050/normal_5fa3d71aed876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426424/normal_5fbf5e2c02d85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418362/normal_5f9ebd7dee3b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5fbe2964ebe51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376105/normal_5f958bc5c7d88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f8c96b1ee496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_5fa72ca5ecc6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_5fbe8f1ae2209.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5f93ed7806461.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/gifojuxaxeva/xetelumupaludezedug.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_off0000c634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC634 5868 bytes
SHA-256: d9999ff352815bbf90e0a3e1fee2107f99fb887463c3b32e0d5888762e35f167
font_01_sfnt_off0000da0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0B 9828 bytes
SHA-256: b219f32c1bbda73cfcdbe244bd4d0dc27175bcdb9afcd659905431e38dcb731e

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