Malicious PDF — malware analysis report

Static analysis result for SHA-256 24d715982f7d2017…

MALICIOUS

PDF

72.2 KB Created: 2021-02-26 06:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b16f33450d6a69291333aeae08112a30 SHA-1: a17e899fa787c118812d8fdd632dac2ee904d0b7 SHA-256: 24d715982f7d20171e02853a2a9b7ce3785f30623fde9ea5dcbde05428db4eb6
184 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with at least one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to installing software, likely a lure. The presence of a malicious redirector suggests the intent is to lead the user to a malicious site for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9511

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/award?keyword=how+to+install+mendeley+in+word In PDF document text
    • http://vykupavto54.ru/dofuninazokejudesegived7mtch.pdfIn PDF document text
    • https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/jobaxube.pdfIn PDF document text
    • http://flash-sar.online/grocery_shopping_template_free_printablettafs.pdfIn PDF document text
    • https://gukikaxut.weebly.com/uploads/1/3/0/7/130775725/nudapoxozafel.pdfIn PDF document text
    • http://mail-autoscout24.net/arijit_singh_song_ringtone_download_202066dam.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/20089507583.pdfIn PDF document text
    • http://skidki-day.site/consejos_para_un_estilo_de_vida_mas_saludablerf4g7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gubodasitonobu.epizy.com/bsc_online_form_2018.pdfIn PDF document text
    • http://fedununa.epizy.com/latizixafugowidatuxorosu.pdfIn PDF document text
    • http://wasalesex.epizy.com/85773724854.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/dodat.pdfIn PDF document text
    • http://rulumagevamed.epizy.com/windows_defender_vs_avast_performance.pdfIn PDF document text
    • http://fimogaselan.rf.gd/allah_hu_akbar_coke_studio_free.pdfIn 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_off0000e990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE990 5128 bytes
SHA-256: 716d68672d0133d0837305a394c051229128aecdfcfd7322e0b9be9a270ddd13
font_01_sfnt_off0000faf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF8 10504 bytes
SHA-256: 8b98f7d52bbf1fdb4358638172f830f516250e6671416084a7a066545c41aabd

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