Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb59d2e851bbdd7…

MALICIOUS

PDF

81.5 KB Created: 2021-03-04 22:02:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e631798bc9d20d5ca21d3c2d9e3ec0e9 SHA-1: 9ce377ce196b6eb568989762f9bde92d8acb9580 SHA-256: 0eb59d2e851bbdd76f8bb18fb966d48549051b08c8494433013fb54ccf4e2e33
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://fokemale.ru/123?utm_term=millermatic+130+parts+diagram PDF link annotation
    • https://cdn.sqhk.co/pirujezexod/xjfjfhf/11477049914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5fd5fbfc2109c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450438/normal_5fe23fa6953c0.pdfIn PDF document text
    • https://cdn.sqhk.co/fivufotimad/jHO9Zgc/zewipabuzovebuxenazita.pdfIn PDF document text
    • https://xilexuluta.weebly.com/uploads/1/3/6/0/136094269/wexifugirolexajik.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/gjgdjfX/67886559202.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/hgNCCuK/bafudevogaxoloxizuzeg.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/227176e4.pdfIn PDF document text
    • https://totovipuvo.weebly.com/uploads/1/3/2/7/132740708/747adc85c808c.pdfIn PDF document text
    • http://nashremont.site/smile_emoji_imagesrzzks.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473926/normal_600ded475cec4.pdfIn PDF document text
    • https://duzuvopewawufos.weebly.com/uploads/1/3/4/4/134491429/0f34dc728fdf4.pdfIn PDF document text
    • http://ita-bio.fun/african_basket_wall_setukp9z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462341/normal_5fd3504c56b15.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://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_028039bdb8cd4cadab9efb3e2846e4ce.pdf?index=trueIn PDF document text
    • https://0c2a7d7b-be9d-4ef2-a94c-09ca905cc17d.filesusr.com/ugd/7d21c0_663cd1d86c9048158bca0026e1479f69.pdf?index=trueIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_cfc5c052e44244b7b44130baae815b57.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/work_completion_report_letter_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/xbox_one_s_error_code_0x82d40007.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_off0000f4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F4 5328 bytes
SHA-256: c79e58a0e13095a173af8df36e2e972dc87605e0d11854f4239c2b5929440148
font_01_sfnt_off00010712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10712 10336 bytes
SHA-256: 4ad5c951468269497ba004680e4972e0c5cf5fc8f0561adb648bb1ceb17cb277
font_02_sfnt_off00012aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2