Malicious PDF — malware analysis report

Static analysis result for SHA-256 538302bb0b019ef1…

MALICIOUS

PDF

85.0 KB Created: 2021-05-20 12:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 557b07a3c2b69d71c76ba503bca602e9 SHA-1: 8af0b1d150834f587b07d8ffb05718f4115e0cba SHA-256: 538302bb0b019ef117d6ea4abed44e058d8e56199e41b98e3d499d6156b36dd1
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://druttle.ru/strik?utm_term=capitulos+de+moises+y+los+10+mandamientos+en+telefe PDF link annotation
    • https://xudujebu.weebly.com/uploads/1/3/6/0/136090205/c9c7e227950be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481520/normal_602e28f1b7e8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411252/normal_5fcf1282edf68.pdfIn PDF document text
    • https://lepekogiba.weebly.com/uploads/1/3/1/6/131637498/4951139.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406771/normal_5fc9befe322eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413458/normal_600174715ff30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_60509c261a170.pdfIn PDF document text
    • https://notozovurex.weebly.com/uploads/1/3/2/8/132814393/5964006.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/jedadokuti/the_looming_tower_tv_series_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/97963405390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af90f6c3-1313-4651-a3ad-59df8750ae15/how_to_be_a_school_trustee.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/kekufanupok.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/fuporinurowewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6c0e37-a9ae-43ff-ba2c-8c5481e404f7/58335585129.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/7035750544.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/bevovefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8bcdab-b26f-47bb-981e-c1ebb1db0dbe/52411072908.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A1 5292 bytes
SHA-256: 44f5dcf721a1792a20da3969ae0e58004102ba5a88d8d0795ce28113f12b975f
font_01_sfnt_off0001039f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039F 13408 bytes
SHA-256: d7cc461b72dbab03675085a75edb55ab8fef201f303b8609ea0df49468cf53ac
font_02_sfnt_off00012f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F25 16076 bytes
SHA-256: 52eeab410c4e25c4f0f186b63c11564398b174f61741408c06ef9d414f60f438

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