Malicious PDF — malware analysis report

Static analysis result for SHA-256 c87fd2ee42d768d1…

MALICIOUS

PDF

80.0 KB Created: 2021-03-29 14:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bb83147f6be7f63d54b65d901cf47a2f SHA-1: 9a4e43c21bde15167f6d223f2a12cf133d9d0882 SHA-256: c87fd2ee42d768d140bebaac648762842bc0d49277a4316343024af3030e2310
154 Risk Score

Malware Insights

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

The file is a PDF that contains a critical heuristic firing for a malicious redirector link pointing to 'https://dafemum.ru/award?keyword=adriana+lecouvreur+poveri+fiori+pdf'. This indicates an attempt to redirect the user to a potentially harmful site. The ML classifier and ClamAV also flagged this PDF as malicious, supporting the phishing or malware distribution intent. No scripts were extracted, but the presence of a malicious URL is a strong indicator of malicious activity.

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://dafemum.ru/award?keyword=adriana+lecouvreur+poveri+fiori+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4486534/normal_5ff54335df8db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473384/normal_601279eb67859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_605d8b14ae0fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495994/normal_604ff27524c4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498801/normal_605306a5268d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454421/normal_5fea142c64c2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402246/normal_60436139a0f84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491450/normal_605f9c6087a97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_600ac8a97d80d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417999/normal_602a1f48be59f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470533/normal_5ffcbdcb68ec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_601673099085b.pdfIn PDF document text
    • http://esportzmlevent.com/nature_d_un_motkjarf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482426/normal_5fe78850ba0e1.pdfIn PDF document text
    • http://design-kvartira.info/ap_research_presentation_rubric_2020rkgdq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404292/normal_5fec9377354f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462732/normal_5ffdb710a9229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417413/normal_6025ecf97e989.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/zesotat/pdf_binary_to_base64_javascript.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/jerovidopejum.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/winter_house_tips.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_off0000f737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF737 5020 bytes
SHA-256: 4aa27aac68e4a2e6a14f43f4adb6159b6ce366e08b3c131eab40da3ad0aacf04
font_01_sfnt_off00010865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10865 13076 bytes
SHA-256: 6e37004d91089ad73af298dc0374e15edb8cfbb21a646a5ce4d51531247fe4f9

Open this report in the interactive analyzer, or submit your own file for analysis.