Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd973fbb87c8806…

MALICIOUS

PDF

129.2 KB Created: 2020-12-24 11:14:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9ab69441904ad456f35ba2fa3735bfec SHA-1: 7a8ed727da1aca48f2c953eb073dec251de17e7c SHA-256: cfd973fbb87c88066ec7513834ba53760101cb30c52dd9589b3971b7e121939d
214 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, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. Additionally, the PDF_SEO_LINK_FARM heuristic suggests a large number of external links, with one pointing to a potentially malicious domain. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/strik?utm_term=liverpool+fc+champions+league+2020 In PDF document text
    • https://wejakoguxi.weebly.com/uploads/1/3/4/3/134324676/viwowovivejulu.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/mizikix_bisatezi_nepinek_bebixakewos.pdfIn PDF document text
    • https://defelewag.weebly.com/uploads/1/3/2/7/132741475/47da7fc80d864f3.pdfIn PDF document text
    • https://kirewigofe.weebly.com/uploads/1/3/4/3/134382955/8909863.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/xidulumexi/fashion_show_themes_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b73c4208-1594-480d-be2a-755fcb4e8830/fundamentals_of_probability_with_stochastic_processes_3rd_edition_solutions_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/minecraft_mod_apk_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/hotwire_communications_tv_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9284d15f-3a96-4179-a1ef-45ce417d1285/democracia_como_forma_de_gobierno_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/charity_commission_serious_incident_reporting_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/dumping_syndrome_diet_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/modern_history_book_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/magnetic_field_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/programming_in_lua_fourth_edition_github.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/77292248987.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/38610202223.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_off00016313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16313 31724 bytes
SHA-256: d4a42d19bc04f84f7d14e4e4e313a71c8c68a73897b2b221d6d58d9bbcf04706
font_01_sfnt_off0001babe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BABE 5704 bytes
SHA-256: bdcca19f5ccb5cfc26eae5295397deb1cbe4d5c1afae3dc101e9a6dfb42488d2
font_02_sfnt_off0001ce10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE10 12784 bytes
SHA-256: 49216176e75def58bd1004d325cbe8cbad8c943c11c49e35c517f5944d3586b5

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