Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c45fc87bd71265…

MALICIOUS

PDF

68.7 KB Created: 2020-11-12 14:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2fe410490f0368e025925388665cb311 SHA-1: df1c811596377d818bfe34ec77fcbe6fe5a36462 SHA-256: 27c45fc87bd71265c6e8bb98a5ad78e6af821edbdfd04358971a678ade6e0bc1
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://trafffe.ru/123?utm_term=maggie+toulouse+oliver PDF link annotation
    • https://lonunupamazukev.weebly.com/uploads/1/3/4/7/134711915/zisibek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476420/normal_5fa72ed171e41.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/momanox.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/dinisemowoge/charlottesville_va_white_pages_phone_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/hempworx_compensation_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/depixosojozojegirakupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0cf2a7-0288-4003-a874-c1703b32f53c/one_point_perspective_boxes_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/ed_edd_eddy_full_episodes_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/o_praise_him_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/95604179876.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiwovowus/mapa_politico_de_puerto_rico.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/mefosodetefenakekubove.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/30189564314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd0b715-a0e6-4153-9749-ab20d587738e/omphalos_kim_jung_gi.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_off0000d135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD135 4920 bytes
SHA-256: 11d6be98c88835c800a9a5d43d0eb1c08ff75b03495d8baad14b87e58d693ef3
font_01_sfnt_off0000e215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE215 10588 bytes
SHA-256: 49e80fccc80dd8ff9133c315e3ac929b3aba2f77296355d4f3d3d9be0be1daab

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