Malicious PDF — malware analysis report

Static analysis result for SHA-256 da98d7abfea2d4e0…

MALICIOUS

PDF

83.0 KB Created: 2021-03-08 23:21:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 567f28ddd4d6c8fe105d564f161e2d73 SHA-1: 4abf8c99a8424604c5e16aedbbd17e7f5415e7f7 SHA-256: da98d7abfea2d4e0e7e14620a39a033052a3d9be3ccccf5ff5b02b5a1f94d250
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains and flagged as link farms, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/aws?utm_term=how+to+program+esp8266+12e+using+arduino+uno PDF link annotation
    • http://forovasax.medianewsonline.com/99754505387.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406166/normal_5fc92ee089cf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418567/normal_600c90410ab26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447649/normal_6046549932108.pdfIn PDF document text
    • http://joritirumag.mypressonline.com/best_short_stories_for_high_school_from_other_countries.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/scary_stories_to_tell_in_the_dark_illustrations_reddit.pdfIn PDF document text
    • http://luwinilulurop.mywebcommunity.org/changing_my_name_after_marriage_checklist.pdfIn PDF document text
    • http://werikipirojenob.scienceontheweb.net/12783928432.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450046/normal_5fee4520498cb.pdfIn PDF document text
    • http://fadulifakibul.medianewsonline.com/acid_reflux_food_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476954/normal_60047c10434ee.pdfIn PDF document text
    • http://fewudutizoxom.medianewsonline.com/is_there_any_big_nate_movies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366346/normal_5fdf5a4cdf737.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481539/normal_5ffef5b122d16.pdfIn PDF document text
    • http://vobalemujumojak.mywebcommunity.org/bupetakebeku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382194/normal_6026b0c4a7e86.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/rozebofukixus/68816711719.pdfIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_e998c5c2a1a044c9a7c2af7f82b25c3b.pdf?index=trueIn PDF document text
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_d766d0a251214ebf9e79e0712348783c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/high_school_biology_macromolecules_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/lasuzazuwasokumiwajadu.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/60967281884.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_off000104df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DF 5832 bytes
SHA-256: 60c7ed88a4ac517f7c2f5a53bcc3024fe299d938ec0bae8f56871a8bc03e19a4
font_01_sfnt_off000118ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BA 10992 bytes
SHA-256: dad5e293ee1aa524894745e9bc29932d80668fa0a4dd14cf300ed65f69d4b286

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