Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d8cc777cf28641…

MALICIOUS

PDF

80.9 KB Created: 2021-02-18 17:45:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7f6a74d00a9a6fee0709a65ab9bf9668 SHA-1: 217236e2141261a57d473d21c2e2d78443094bd4 SHA-256: 68d8cc777cf28641514bc01c2c18b198114c30d0f1b667d17e813667646ebbc2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary external URL points to a suspicious domain, suggesting a phishing or malicious content distribution attempt. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate a malicious intent to redirect users to potentially harmful sites, aligning with spearphishing tactics.

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://jacksth.ru/strik?utm_term=belchior+divina+com%25C3%25A9dia+humana+significado PDF link annotation
    • http://fb-ig-copyright.com/movifaluxulumipetmxkoh.pdfIn PDF document text
    • http://ludshop.xyz/59279849481w0kzd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474475/normal_5fd653eb64345.pdfIn PDF document text
    • https://futokiwusilo.weebly.com/uploads/1/3/4/4/134458686/9913537.pdfIn PDF document text
    • http://kikebumanexewuj.22web.org/barbie_doll_game_please.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500186/normal_5fe7ad89b4d25.pdfIn PDF document text
    • http://motowifenizemuz.22web.org/hundred_grid_worksheet.pdfIn PDF document text
    • https://jozegolufipiz.weebly.com/uploads/1/3/0/7/130776065/kafadorokaguwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379379/normal_5ff28427b3cd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5fd61730e261b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pegozegi/7730863526.pdfIn PDF document text
    • http://gekavitominugi.epizy.com/ctet_question_paper_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/noretawetu.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/george_eliot_silas_marner_sat_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/8927574404.pdfIn PDF document text
    • http://webubop.rf.gd/mofenusobib.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/google_sheets_create_drop_down_list.pdfIn PDF document text
    • http://sovuberexizizir.epizy.com/simple_software_implementation_plan_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE4 5488 bytes
SHA-256: d50ee11a11e06bc5bfc616555ea7f5a82ff5faa474fb6c83daac69e87c211ce0
font_01_sfnt_off0000ff15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF15 12648 bytes
SHA-256: 1e0101e2a4f114e4f7f9fb38b50786a066efd97afe8ecaa57f57086d6dbead2c
font_02_sfnt_off0001262d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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