Malicious PDF — malware analysis report

Static analysis result for SHA-256 d524b42acf55c914…

MALICIOUS

PDF

74.6 KB Created: 2021-04-01 23:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4dbe94c2f758e5be52caba2d28b05e20 SHA-1: ef18c60cc0af6b7581ab89e1b09a3fc9427d7792 SHA-256: d524b42acf55c914d06a4dcdffe8159bb6d57078362e52e3846dfa0a52e63825
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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
  • 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://gimoguvi.ru/award?keyword=bruchrechnen+division+aufgaben+pdf PDF link annotation
    • https://zujanotoze.weebly.com/uploads/1/3/4/4/134476942/8490434.pdfIn PDF document text
    • http://fojefojegut.medianewsonline.com/variedades_de_cafe_resistentes_ala_roya.pdfIn PDF document text
    • http://xufikefizot.sportsontheweb.net/aaron_sorkin_to_kill_a_mockingbird_script.pdfIn PDF document text
    • https://dawopodesolapip.weebly.com/uploads/1/3/5/3/135327749/budir.pdfIn PDF document text
    • https://sodumixiseto.weebly.com/uploads/1/3/4/3/134311801/rakuwugapafe.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/zepaxikagolozezetu.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/geluxixiriwula_kajubavu.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/jamuluvuvava/diccionario_biblico_ilustrado_holman_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/romantic_birthday_song_for_husband.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/lirosovopovik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8f59171-1aad-453e-9fea-264dab4fbf27/vojumuropapabujirugir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/213dbf90-9f4a-4e2c-ac83-adcc921dd947/kepemasibixoruzoleputavik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b3395e8-8ba5-459a-8274-9a4e3b093f9f/what_were_lenin_accomplishments.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/55856991354.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/how_much_money_does_fernando_alonso_make.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/feralis_biology_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/excel_vba_range_variable_type_mismatch.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/human_respiratory_system_parts_and_functions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e3cbe7-743d-4682-967a-c5b3bebabe7d/95737056778.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33C 5632 bytes
SHA-256: 3b2c1d0d882736af7d09c3c9eb23ef4a88b5d5ac7c4869923f2f141d8a12cd9e
font_01_sfnt_off0000f667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF667 11824 bytes
SHA-256: 39909e99311fae50878938e9f53aba63327dbdddbe3c9e7dae4e18cb07e19f8d

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