Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a0844a088601de…

MALICIOUS

PDF

69.3 KB Created: 2020-11-09 23:12:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ea09a80c1d6657d8d597175670936e94 SHA-1: 1d9b4bc88f4c7cc85ccaf4da5b4d2d4a223b2f95 SHA-256: 40a0844a088601de84639ff4bf8a684088b062d3f369ee63714c1d91ddf3cbea
154 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/123?keyword=catmon+malabon+zip+code'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or malware delivery attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ggtraff.ru/123?keyword=catmon+malabon+zip+code In PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/8933243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5f91269463c44.pdfIn PDF document text
    • https://durewisopugus.weebly.com/uploads/1/3/4/3/134369166/8412029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_5f9e5006abef6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387427/normal_5f93a0b6bff83.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/towalikikejuw.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/nimanufezawoxev_leboz_dasapuzivezo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3e08dd0f-d0f5-4089-ae4c-fabf2d177947/16138852488.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/disney_365_bedtime_stories.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_off0000c5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F1 4948 bytes
SHA-256: 5f7ba2d6570ccc624728928e2ad4c942f72f2b05ea66e5b983867096f5fe65b4
font_01_sfnt_off0000d6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AC 10632 bytes
SHA-256: ef70d64a1d19c6f6f8ff6140327edbcbba37b56c6eaee1dc78a8a42ce5e19b93
font_02_sfnt_off0000fada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3