Malicious PDF — malware analysis report

Static analysis result for SHA-256 409eadb190431743…

MALICIOUS

PDF

74.7 KB Created: 2021-01-04 21:27:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3cd9c85a4e61a3badd1e3fd9ef707fee SHA-1: 85ea76fd3e3ba85e9f948ffdd7af43495a67c4de SHA-256: 409eadb190431743a074bd72c698f68e4071acab744434d4385498b7d468950d
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a 'formal letter on letterhead template', aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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.
  • 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://ggtraff.ru/aws?utm_term=formal+letter+on+letterhead+template In PDF document text
    • https://lupunudarowujak.weebly.com/uploads/1/3/4/5/134599946/1ec31803bd69d30.pdfIn PDF document text
    • https://vesivugabe.weebly.com/uploads/1/3/4/8/134881415/4409da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476127/normal_5fd9c1fdce29b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392666/normal_5f9065f1efc4d.pdfIn PDF document text
    • https://galanutix.weebly.com/uploads/1/3/4/5/134591813/2959974.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/6c4c799ea4bdf6.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/nonabafat/webifagupatizinog.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/kimopakivamotusebe.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/crash_3_gem_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/glioblastoma_multiforme_treatment_md_anderson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6772dea-c589-48b3-893f-3792d2f15ce6/total_solar_eclipse_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/banuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26e6ec1c-70e3-4881-a8c4-7955dab412ad/timepass_marathi_movie_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29ab4c2e-6382-4d7c-824d-f156f4ff3d8b/sujivirubuj.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_off0000e788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE788 4976 bytes
SHA-256: 08c979c44bd6245cb1e2e7188f1bef082b21d3413f32083df87068db58b28a9e
font_01_sfnt_off0000f840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF840 10948 bytes
SHA-256: c4079b358def3149c0b620952728c45d16fa98951ac88c7f5e78e93edc2c4c91

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