Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a80e7681481a23…

MALICIOUS

PDF

77.2 KB Created: 2021-05-27 10:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: cb4d2d1dcb03d4f2ca33c1b23e590d18 SHA-1: d142ac51acf710d2f56a9754ab1064f4a76d4d4b SHA-256: c3a80e7681481a23ea9efb93c78cd0c692962d3cce8179593cc734122d08102d
162 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://dafemum.ru/strik'. This URL is likely part of a phishing campaign designed to trick users into visiting a malicious site. The ML classifier also flagged the PDF with high confidence. No scripts were extracted, but the presence of a malicious URL strongly suggests a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=how+to+set+time+on+citizen+eco+drive+radio+controlled+red+arrows In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372371/normal_5fe62179559c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472773/normal_600d5b274fd0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461202/normal_6013b6cbca50e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413578/normal_605e0307e8f05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498345/normal_5fc8723c7b03f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426558/normal_60004972c256f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416316/normal_5ffcfaf81a94e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460071/normal_5fef18b4ad1cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_60226bd626ea9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469834/normal_5fcff6b07ec8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_605b320b8abad.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/e71f8253-c154-4609-96eb-8c5c90ea160a/how_to_see_preview_of_rdlc_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a6a4fe-a548-4c71-8686-e71d3d4a3692/pioneer_vsx_822_remote_control_volume_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/924abab7-911d-460c-a747-d08a4cde2a23/binomajerixulawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c05bb8-44b4-41e2-8234-700de3b58398/88743761306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d5e1248-af50-4b38-8d23-8208b84f5ddb/selenium_testing_tutorial_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70eca9b3-cbac-46dc-9753-1bd4e77a4a9d/88478653245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f20289ca-8d12-45ff-b229-110ecb4224ad/vinyl_decal_installation_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bf4a4fe-4735-40e4-8b1e-d3fdc8fa3261/tujeporotifi.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_off0000e1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F2 5036 bytes
SHA-256: e329c759c82edc4cd4ab8306b01a128162f7c03f202dbcf883a8c4357ccc7224
font_01_sfnt_off0000f30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30D 11080 bytes
SHA-256: e3044636e0eb6738f249cd298a063464c384a2d30666bbab9e396bdcfc3f1ddc
font_02_sfnt_off000118ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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