Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6a8ee55b28bbf8…

MALICIOUS

PDF

74.7 KB Created: 2021-03-16 03:19:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 87c0bd1698f9d8cda5d2a79e93dc2b86 SHA-1: 7af40cb3c4342f1a6defdfcdc7cf9c4b09ed3ef2 SHA-256: ca6a8ee55b28bbf89bda489364c05f5790f92cf3773d26016aeac64a1b703269
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or redirection scheme. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external links and the PDF_SEO_LINK_FARM heuristic indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9211

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://midufefew.ru/award?keyword=amnistie+fiscale+maroc+2020+pdf PDF link annotation
    • http://ziratonis.iblogger.org/22236137990.pdfIn PDF document text
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/kidexidu.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/63f4415c.pdfIn PDF document text
    • https://bokowamimufap.weebly.com/uploads/1/3/2/7/132712050/8151004.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/16312623847.pdfIn PDF document text
    • https://nobewiga.weebly.com/uploads/1/3/5/3/135315034/3177771.pdfIn PDF document text
    • http://didazema.mypressonline.com/lafavusaxenegusikavizowuj.pdfIn PDF document text
    • https://xezelugewopisaw.weebly.com/uploads/1/3/5/3/135311865/nipajoz-xunalafiwoli.pdfIn PDF document text
    • https://metelegib.weebly.com/uploads/1/3/1/3/131380803/2499474.pdfIn PDF document text
    • http://vemusopudin.22web.org/clash_royale_hack_for_android.pdfIn PDF document text
    • https://fomemavinujidi.weebly.com/uploads/1/3/1/4/131414297/4b73e358284e6f7.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/8358430.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
    • http://soxuxemakim.rf.gd/zulomisodupafo.pdfIn PDF document text
    • http://kagufunoziwezu.epizy.com/billboard_music_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/what_should_i_wear_to_disney_in_february.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/autocad_crack_file_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/charlie_puth_songs_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/kuhn_the_copernican_revolution.pdfIn 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_off0000e2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F7 5352 bytes
SHA-256: 6b470d37c910557578c13c741d7779668e6adf0b270708009831afbdb3dfc3a1
font_01_sfnt_off0000f4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F9 12096 bytes
SHA-256: 41487436fd418b2caceb3c3dc038f8a2f8e3ad17864741abe31e21243d1ef62a
font_02_sfnt_off00011b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B73 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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