Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0be7c841ec9aeea…

MALICIOUS

PDF

81.3 KB Created: 2021-03-20 03:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 21e480923685c6119b8198cedfeb2267 SHA-1: a98e352b0d49e6afd1b0514238d5cde3daaf4a90 SHA-256: b0be7c841ec9aeeac314ea1b37be71e75055d08bda1e9af17e942d18f012bca5
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, designed to redirect users to download other PDF files. The document body mentions 'Job biodata format pdf download', suggesting a lure to trick users into downloading these linked files. While no scripts were directly extracted, the PDF structure and the presence of external links indicate a potential for malicious content delivery, possibly through embedded JavaScript or other exploit vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://botokaw.ru/award?keyword=job+biodata+format+pdf+download PDF link annotation
    • http://tijudozi.scienceontheweb.net/download_english_picture_dictionary.pdfIn PDF document text
    • http://lakujalinifibo.mypressonline.com/jomasumiseviluzafavar.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/87492956923.pdfIn PDF document text
    • http://zesenadozefut.sportsontheweb.net/traktor_kontrol_s4_s5_flight_case.pdfIn PDF document text
    • http://fetesitomer.mygamesonline.org/aparato_respiratorio_tortora.pdfIn PDF document text
    • http://govuxojikasumot.scienceontheweb.net/40105659625.pdfIn PDF document text
    • http://farunoraxukiz.getenjoyment.net/dafitowabupinagat.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/41110065985.pdfIn PDF document text
    • https://gevoxegugajaber.weebly.com/uploads/1/3/4/6/134668378/kixeda-pewaniz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vufuwulofakugef.rf.gd/goat_simulator_ritual_achievement.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/898297597.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/bolutewova.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/wunozorebuf.pdfIn PDF document text
    • http://luxixeg.epizy.com/9636378792.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/2004a_lcd_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/monthly_calendar_template_september_2019.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_off00010085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10085 5228 bytes
SHA-256: 816c6c433036cea231191afc76ac843f1f261284af1f6114e6bd3ec12c42f138
font_01_sfnt_off0001124a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124A 11128 bytes
SHA-256: dbf86db8739edae2cbea60d91e057976640ee972de4e962aa2cb5feeb6dc1fd8

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