Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a175de349454ae…

MALICIOUS

PDF

84.2 KB Created: 2021-01-10 12:55:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7dcb24e3a3a76131370fef8b7cab421f SHA-1: d839763f264790e6220cdff252f861cdcb8389dc SHA-256: 42a175de349454ae3eef58b771593373a6b27582d3dceea83c056c9d7d9ed0c7
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'Christmas background photoshop free'. The presence of numerous external PDF links, including one to a potentially malicious redirector, indicates an attempt to lead the user to harmful content. The ML classifier and ClamAV detection strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/aws?utm_term=christmas+background+photoshop+free In PDF document text
    • https://cdn.sqhk.co/sigidezok/Sjijchb/praise_and_worship_songs_youtube_2019.pdfIn PDF document text
    • https://site-1175393.mozfiles.com/files/1175393/game_age_of_empires_untuk_android.pdfIn PDF document text
    • https://site-1197494.mozfiles.com/files/1197494/fanur.pdfIn PDF document text
    • https://fakavenudir.weebly.com/uploads/1/3/4/0/134042443/2576cab10e73.pdfIn PDF document text
    • https://cdn.sqhk.co/kufejeni/dbhvji9/28784944551.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://s3.amazonaws.com/tonemakopinibem/final_written_warning_template_for_absenteeism.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/dasatinib_prescribing_information.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/10218941993.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/clarion_cz702_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/elements_of_literature_word_search_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/lotedewexelis.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/pupuregifudebapexa.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_off0000fdfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFE 5644 bytes
SHA-256: a41794ccecee22db5b8d422daf9416fae008ec31c8a801b75d04fdc770c07e78
font_01_sfnt_off00011102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11102 10744 bytes
SHA-256: 0a5faffdb797f7c09db0a580775745081575902e5ef1cbc56ea8efdc3b73e0b8
font_02_sfnt_off000135ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135BA 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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