Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d0af4f392da87a…

MALICIOUS

PDF

75.2 KB Created: 2021-02-22 13:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 359fe5a3bd6aed1fa1b9c817f3b59fc9 SHA-1: d85bd470acba3ddbc95a8138e170773c818f5eb9 SHA-256: 82d0af4f392da87ad725704626ef70893d4b400facaff9947d08ff76bb747fb1
136 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are hosted on free services and appear to be part of a link farm. The document body, though heavily obfuscated, contains text related to search queries, suggesting a lure to a malicious website. The ML classifier strongly indicates maliciousness, and the presence of numerous URLs points towards a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://leonvi.ru/aws?utm_term=lg+g+vista+won+factory+reset+pin PDF link annotation
    • https://mojapilujo.weebly.com/uploads/1/3/0/9/130969316/f318f70ee48dbe.pdfIn PDF document text
    • http://wiinorama.fun/38262138106ylv4y.pdfIn PDF document text
    • http://golifidisonopat.iblogger.org/bts_love_yourself_piano_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/cicidjg/empires_puzzles_build_guide.pdfIn PDF document text
    • http://extraterrestrials.space/tangle_teezer_thick_and_curly_amazonej45g.pdfIn PDF document text
    • http://table-wait.com/zeguluxopuma1fr.pdfIn macro / runtime command snippet
    • http://nubolutlion.xyz/83990946445ce81p.pdfIn macro / runtime command snippet
    • http://stat-index-co.com/movarakewizolulibw6414.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/nisiwanolom/46097366635.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/disadvantages_of_non_probability_sampling.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/rewitakosezojufitikirodi.pdfIn PDF document text
    • http://ratagewenik.epizy.com/android-_x86_64-_oreo._7z.pdfIn PDF document text
    • http://jolavewavesuj.epizy.com/64189817295.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/1370371164.pdfIn PDF document text
    • http://nejasixefunik.rf.gd/elements_of_art_color_sheet.pdfIn macro / runtime command snippet
    • https://s3.amazonaws.com/metakibeme/rate_of_iodination_of_acetone_lab_report.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_off0000e999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE999 5348 bytes
SHA-256: 63e2b8a0daad00889911af6e99bb11ca80895365236b2a7e95b21037af2c6add
font_01_sfnt_off0000fc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC06 10588 bytes
SHA-256: b95f33068907b35254be9f80b813056ce566006a7f794f55563e639e4aa54d6f